CVE-2023-6246 (GCVE-0-2023-6246)

Vulnerability from cvelistv5 – Published: 2024-01-31 14:06 – Updated: 2026-07-14 12:03
VLAI
Title
Glibc: heap-based buffer overflow in __vsyslog_internal()
Summary
A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-02-09 05:00 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
References
Impacted products
Date Public
2024-01-30 00:00
Credits
Red Hat would like to thank Qualys Threat Research Unit for reporting this issue.
Show details on NVD website
To clipboard 

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                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 8.4,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS"
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-122",
                  "description": "Heap-based Buffer Overflow",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-02-16T13:05:53.547Z",
            "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
            "shortName": "redhat"
          },
          "references": [
            {
              "url": "http://packetstormsecurity.com/files/176931/glibc-qsort-Out-Of-Bounds-Read-Write.html"
            },
            {
              "url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html"
            },
            {
              "url": "http://seclists.org/fulldisclosure/2024/Feb/3"
            },
            {
              "url": "http://seclists.org/fulldisclosure/2024/Feb/5"
            },
            {
              "tags": [
                "vdb-entry",
                "x_refsource_REDHAT"
              ],
              "url": "https://access.redhat.com/security/cve/CVE-2023-6246"
            },
            {
              "name": "RHBZ#2249053",
              "tags": [
                "issue-tracking",
                "x_refsource_REDHAT"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2249053"
            },
            {
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/"
            },
            {
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/"
            },
            {
              "url": "https://security.gentoo.org/glsa/202402-01"
            },
            {
              "url": "https://www.openwall.com/lists/oss-security/2024/01/30/6"
            },
            {
              "url": "https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt"
            },
            {
              "url": "https://security.netapp.com/advisory/ntap-20240216-0007/"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2023-11-06T00:00:00.000Z",
              "value": "Reported to Red Hat."
            },
            {
              "lang": "en",
              "time": "2024-01-30T00:00:00.000Z",
              "value": "Made public."
            }
          ],
          "title": "Glibc: heap-based buffer overflow in __vsyslog_internal()",
          "x_redhatCweChain": "CWE-122: Heap-based Buffer Overflow"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2023-6246",
        "datePublished": "2024-01-31T14:06:21.949Z",
        "dateReserved": "2023-11-21T19:14:21.669Z",
        "dateUpdated": "2026-07-14T12:03:06.835Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.