CVE-2024-9681 (GCVE-0-2024-9681)

Vulnerability from cvelistv5 – Published: 2024-11-06 07:47 – Updated: 2025-11-03 20:56
VLAI
Title
HSTS subdomain overwrites parent cache entry
Summary
When curl is asked to use HSTS, the expiry time for a subdomain might overwrite a parent domain's cache entry, making it end sooner or later than otherwise intended. This affects curl using applications that enable HSTS and use URLs with the insecure `HTTP://` scheme and perform transfers with hosts like `x.example.com` as well as `example.com` where the first host is a subdomain of the second host. (The HSTS cache either needs to have been populated manually or there needs to have been previous HTTPS accesses done as the cache needs to have entries for the domains involved to trigger this problem.) When `x.example.com` responds with `Strict-Transport-Security:` headers, this bug can make the subdomain's expiry timeout *bleed over* and get set for the parent domain `example.com` in curl's HSTS cache. The result of a triggered bug is that HTTP accesses to `example.com` get converted to HTTPS for a different period of time than what was asked for by the origin server. If `example.com` for example stops supporting HTTPS at its expiry time, curl might then fail to access `http://example.com` until the (wrongly set) timeout expires. This bug can also expire the parent's entry *earlier*, thus making curl inadvertently switch back to insecure HTTP earlier than otherwise intended.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-06 16:16 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
curl curl Affected: 8.10.1 , ≤ 8.10.1 (semver)
Affected: 8.10.0 , ≤ 8.10.0 (semver)
Affected: 8.9.1 , ≤ 8.9.1 (semver)
Affected: 8.9.0 , ≤ 8.9.0 (semver)
Affected: 8.8.0 , ≤ 8.8.0 (semver)
Affected: 8.7.1 , ≤ 8.7.1 (semver)
Affected: 8.7.0 , ≤ 8.7.0 (semver)
Affected: 8.6.0 , ≤ 8.6.0 (semver)
Affected: 8.5.0 , ≤ 8.5.0 (semver)
Affected: 8.4.0 , ≤ 8.4.0 (semver)
Affected: 8.3.0 , ≤ 8.3.0 (semver)
Affected: 8.2.1 , ≤ 8.2.1 (semver)
Affected: 8.2.0 , ≤ 8.2.0 (semver)
Affected: 8.1.2 , ≤ 8.1.2 (semver)
Affected: 8.1.1 , ≤ 8.1.1 (semver)
Affected: 8.1.0 , ≤ 8.1.0 (semver)
Affected: 8.0.1 , ≤ 8.0.1 (semver)
Affected: 8.0.0 , ≤ 8.0.0 (semver)
Affected: 7.88.1 , ≤ 7.88.1 (semver)
Affected: 7.88.0 , ≤ 7.88.0 (semver)
Affected: 7.87.0 , ≤ 7.87.0 (semver)
Affected: 7.86.0 , ≤ 7.86.0 (semver)
Affected: 7.85.0 , ≤ 7.85.0 (semver)
Affected: 7.84.0 , ≤ 7.84.0 (semver)
Affected: 7.83.1 , ≤ 7.83.1 (semver)
Affected: 7.83.0 , ≤ 7.83.0 (semver)
Affected: 7.82.0 , ≤ 7.82.0 (semver)
Affected: 7.81.0 , ≤ 7.81.0 (semver)
Affected: 7.80.0 , ≤ 7.80.0 (semver)
Affected: 7.79.1 , ≤ 7.79.1 (semver)
Affected: 7.79.0 , ≤ 7.79.0 (semver)
Affected: 7.78.0 , ≤ 7.78.0 (semver)
Affected: 7.77.0 , ≤ 7.77.0 (semver)
Affected: 7.76.1 , ≤ 7.76.1 (semver)
Affected: 7.76.0 , ≤ 7.76.0 (semver)
Affected: 7.75.0 , ≤ 7.75.0 (semver)
Affected: 7.74.0 , ≤ 7.74.0 (semver)
Create a notification for this product.
curl curl Unaffected: 0 , < 7.74.0 (semver)
Affected: 7.74.0 , ≤ 8.10.1 (semver)
Unaffected: 8.11.0 , < * (semver)
    cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
newfunction Daniel Stenberg
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:56:39.087Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2024/11/06/2"
          },
          {
            "url": "https://security.netapp.com/advisory/ntap-20241213-0006/"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/13"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/10"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/9"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/8"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/5"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/4"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/12"
          },
          {
            "url": "http://seclists.org/fulldisclosure/2025/Apr/11"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "curl",
            "vendor": "curl",
            "versions": [
              {
                "lessThan": "7.74.0",
                "status": "unaffected",
                "version": "0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "8.10.1",
                "status": "affected",
                "version": "7.74.0",
                "versionType": "semver"
              },
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "8.11.0",
                "versionType": "semver"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-9681",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-11-06T16:16:59.652768Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-06T17:09:00.777Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.10.1",
              "status": "affected",
              "version": "8.10.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.10.0",
              "status": "affected",
              "version": "8.10.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.1",
              "status": "affected",
              "version": "8.9.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.9.0",
              "status": "affected",
              "version": "8.9.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.8.0",
              "status": "affected",
              "version": "8.8.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.7.1",
              "status": "affected",
              "version": "8.7.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.7.0",
              "status": "affected",
              "version": "8.7.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.6.0",
              "status": "affected",
              "version": "8.6.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.0",
              "status": "affected",
              "version": "8.5.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.4.0",
              "status": "affected",
              "version": "8.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.3.0",
              "status": "affected",
              "version": "8.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.1",
              "status": "affected",
              "version": "8.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.2.0",
              "status": "affected",
              "version": "8.2.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.2",
              "status": "affected",
              "version": "8.1.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.1",
              "status": "affected",
              "version": "8.1.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.1.0",
              "status": "affected",
              "version": "8.1.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.0.1",
              "status": "affected",
              "version": "8.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.0.0",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.1",
              "status": "affected",
              "version": "7.88.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.88.0",
              "status": "affected",
              "version": "7.88.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.87.0",
              "status": "affected",
              "version": "7.87.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.86.0",
              "status": "affected",
              "version": "7.86.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.85.0",
              "status": "affected",
              "version": "7.85.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.84.0",
              "status": "affected",
              "version": "7.84.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.83.1",
              "status": "affected",
              "version": "7.83.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.83.0",
              "status": "affected",
              "version": "7.83.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.82.0",
              "status": "affected",
              "version": "7.82.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.81.0",
              "status": "affected",
              "version": "7.81.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.80.0",
              "status": "affected",
              "version": "7.80.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.79.1",
              "status": "affected",
              "version": "7.79.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.79.0",
              "status": "affected",
              "version": "7.79.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.78.0",
              "status": "affected",
              "version": "7.78.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.77.0",
              "status": "affected",
              "version": "7.77.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.76.1",
              "status": "affected",
              "version": "7.76.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.76.0",
              "status": "affected",
              "version": "7.76.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.75.0",
              "status": "affected",
              "version": "7.75.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.74.0",
              "status": "affected",
              "version": "7.74.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "newfunction"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Daniel Stenberg"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When curl is asked to use HSTS, the expiry time for a subdomain might\noverwrite a parent domain\u0027s cache entry, making it end sooner or later than\notherwise intended.\n\nThis affects curl using applications that enable HSTS and use URLs with the\ninsecure `HTTP://` scheme and perform transfers with hosts like\n`x.example.com` as well as `example.com` where the first host is a subdomain\nof the second host.\n\n(The HSTS cache either needs to have been populated manually or there needs to\nhave been previous HTTPS accesses done as the cache needs to have entries for\nthe domains involved to trigger this problem.)\n\nWhen `x.example.com` responds with `Strict-Transport-Security:` headers, this\nbug can make the subdomain\u0027s expiry timeout *bleed over* and get set for the\nparent domain `example.com` in curl\u0027s HSTS cache.\n\nThe result of a triggered bug is that HTTP accesses to `example.com` get\nconverted to HTTPS for a different period of time than what was asked for by\nthe origin server. If `example.com` for example stops supporting HTTPS at its\nexpiry time, curl might then fail to access `http://example.com` until the\n(wrongly set) timeout expires. This bug can also expire the parent\u0027s entry\n*earlier*, thus making curl inadvertently switch back to insecure HTTP earlier\nthan otherwise intended."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-1025 Comparison Using Wrong Factors",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-06T07:47:20.162Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2024-9681.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2024-9681.html"
        },
        {
          "name": "issue",
          "url": "https://hackerone.com/reports/2764830"
        }
      ],
      "title": "HSTS subdomain overwrites parent cache entry"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2024-9681",
    "datePublished": "2024-11-06T07:47:20.162Z",
    "dateReserved": "2024-10-09T07:57:47.318Z",
    "dateUpdated": "2025-11-03T20:56:39.087Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-9681",
      "date": "2026-10-03",
      "epss": "0.01987",
      "percentile": "0.79899"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-11-03T20:56:39.087Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "http://www.openwall.com/lists/oss-security/2024/11/06/2"
              },
              {
                "url": "https://security.netapp.com/advisory/ntap-20241213-0006/"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/13"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/10"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/9"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/8"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/5"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/4"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/12"
              },
              {
                "url": "http://seclists.org/fulldisclosure/2025/Apr/11"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "affected": [
              {
                "cpes": [
                  "cpe:2.3:a:curl:curl:*:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unknown",
                "product": "curl",
                "vendor": "curl",
                "versions": [
                  {
                    "lessThan": "7.74.0",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "8.10.1",
                    "status": "affected",
                    "version": "7.74.0",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "*",
                    "status": "unaffected",
                    "version": "8.11.0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "HIGH",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "NONE",
                  "baseScore": 5.9,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-9681",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-11-06T16:16:59.652768Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-11-06T16:17:14.568Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "curl",
              "vendor": "curl",
              "versions": [
                {
                  "lessThanOrEqual": "8.10.1",
                  "status": "affected",
                  "version": "8.10.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.10.0",
                  "status": "affected",
                  "version": "8.10.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.9.1",
                  "status": "affected",
                  "version": "8.9.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.9.0",
                  "status": "affected",
                  "version": "8.9.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.8.0",
                  "status": "affected",
                  "version": "8.8.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.7.1",
                  "status": "affected",
                  "version": "8.7.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.7.0",
                  "status": "affected",
                  "version": "8.7.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.6.0",
                  "status": "affected",
                  "version": "8.6.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.5.0",
                  "status": "affected",
                  "version": "8.5.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.4.0",
                  "status": "affected",
                  "version": "8.4.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.3.0",
                  "status": "affected",
                  "version": "8.3.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.2.1",
                  "status": "affected",
                  "version": "8.2.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.2.0",
                  "status": "affected",
                  "version": "8.2.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.1.2",
                  "status": "affected",
                  "version": "8.1.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.1.1",
                  "status": "affected",
                  "version": "8.1.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.1.0",
                  "status": "affected",
                  "version": "8.1.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.0.1",
                  "status": "affected",
                  "version": "8.0.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "8.0.0",
                  "status": "affected",
                  "version": "8.0.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.88.1",
                  "status": "affected",
                  "version": "7.88.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.88.0",
                  "status": "affected",
                  "version": "7.88.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.87.0",
                  "status": "affected",
                  "version": "7.87.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.86.0",
                  "status": "affected",
                  "version": "7.86.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.85.0",
                  "status": "affected",
                  "version": "7.85.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.84.0",
                  "status": "affected",
                  "version": "7.84.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.83.1",
                  "status": "affected",
                  "version": "7.83.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.83.0",
                  "status": "affected",
                  "version": "7.83.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.82.0",
                  "status": "affected",
                  "version": "7.82.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.81.0",
                  "status": "affected",
                  "version": "7.81.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.80.0",
                  "status": "affected",
                  "version": "7.80.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.79.1",
                  "status": "affected",
                  "version": "7.79.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.79.0",
                  "status": "affected",
                  "version": "7.79.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.78.0",
                  "status": "affected",
                  "version": "7.78.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.77.0",
                  "status": "affected",
                  "version": "7.77.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.76.1",
                  "status": "affected",
                  "version": "7.76.1",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.76.0",
                  "status": "affected",
                  "version": "7.76.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.75.0",
                  "status": "affected",
                  "version": "7.75.0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.74.0",
                  "status": "affected",
                  "version": "7.74.0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "newfunction"
            },
            {
              "lang": "en",
              "type": "remediation developer",
              "value": "Daniel Stenberg"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "When curl is asked to use HSTS, the expiry time for a subdomain might\noverwrite a parent domain\u0027s cache entry, making it end sooner or later than\notherwise intended.\n\nThis affects curl using applications that enable HSTS and use URLs with the\ninsecure `HTTP://` scheme and perform transfers with hosts like\n`x.example.com` as well as `example.com` where the first host is a subdomain\nof the second host.\n\n(The HSTS cache either needs to have been populated manually or there needs to\nhave been previous HTTPS accesses done as the cache needs to have entries for\nthe domains involved to trigger this problem.)\n\nWhen `x.example.com` responds with `Strict-Transport-Security:` headers, this\nbug can make the subdomain\u0027s expiry timeout *bleed over* and get set for the\nparent domain `example.com` in curl\u0027s HSTS cache.\n\nThe result of a triggered bug is that HTTP accesses to `example.com` get\nconverted to HTTPS for a different period of time than what was asked for by\nthe origin server. If `example.com` for example stops supporting HTTPS at its\nexpiry time, curl might then fail to access `http://example.com` until the\n(wrongly set) timeout expires. This bug can also expire the parent\u0027s entry\n*earlier*, thus making curl inadvertently switch back to insecure HTTP earlier\nthan otherwise intended."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "CWE-1025 Comparison Using Wrong Factors",
                  "lang": "en"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-11-06T07:47:20.162Z",
            "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
            "shortName": "curl"
          },
          "references": [
            {
              "name": "json",
              "url": "https://curl.se/docs/CVE-2024-9681.json"
            },
            {
              "name": "www",
              "url": "https://curl.se/docs/CVE-2024-9681.html"
            },
            {
              "name": "issue",
              "url": "https://hackerone.com/reports/2764830"
            }
          ],
          "title": "HSTS subdomain overwrites parent cache entry"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "assignerShortName": "curl",
        "cveId": "CVE-2024-9681",
        "datePublished": "2024-11-06T07:47:20.162Z",
        "dateReserved": "2024-10-09T07:57:47.318Z",
        "dateUpdated": "2025-11-03T20:56:39.087Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.