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CVE-2025-61912 (GCVE-0-2025-61912)

Vulnerability from cvelistv5 – Published: 2025-10-10 22:04 – Updated: 2025-10-14 14:58

Title

python-ldap Vulnerable to Improper Encoding or Escaping of Output and Improper Null Termination

Summary

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes \x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP server (e.g., AD), resulting in a client-side denial of service. Version 3.4.5 contains a patch for the issue.

Severity

5.5 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-14 14:57 UTC

CWE

CWE-116 - Improper Encoding or Escaping of Output
CWE-170 - Improper Null Termination

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/python-ldap/python-ldap/securi…	x_refsource_CONFIRM
https://github.com/python-ldap/python-ldap/commit…	x_refsource_MISC
https://github.com/python-ldap/python-ldap/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
python-ldap	python-ldap	Affected: < 3.4.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-61912",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-14T14:57:58.750366Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-14T14:58:06.682Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "python-ldap",
          "vendor": "python-ldap",
          "versions": [
            {
              "status": "affected",
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            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, ldap.dn.escape_dn_chars() escapes \\x00 incorrectly by emitting a backslash followed by a literal NUL byte instead of the RFC-4514 hex form \\00. Any application that uses this helper to construct DNs from untrusted input can be made to consistently fail before a request is sent to the LDAP server (e.g., AD), resulting in a client-side denial of service. Version 3.4.5 contains a patch for the issue."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
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              "type": "CWE"
            }
          ]
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        {
          "descriptions": [
            {
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              "description": "CWE-170: Improper Null Termination",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-10T22:04:25.028Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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        {
          "name": "https://github.com/python-ldap/python-ldap/security/advisories/GHSA-p34h-wq7j-h5v6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/python-ldap/python-ldap/security/advisories/GHSA-p34h-wq7j-h5v6"
        },
        {
          "name": "https://github.com/python-ldap/python-ldap/commit/6ea80326a34ee6093219628d7690bced50c49a3f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-ldap/python-ldap/commit/6ea80326a34ee6093219628d7690bced50c49a3f"
        },
        {
          "name": "https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5"
        }
      ],
      "source": {
        "advisory": "GHSA-p34h-wq7j-h5v6",
        "discovery": "UNKNOWN"
      },
      "title": "python-ldap Vulnerable to Improper Encoding or Escaping of Output and Improper Null Termination"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-61912",
    "datePublished": "2025-10-10T22:04:25.028Z",
    "dateReserved": "2025-10-03T22:21:59.614Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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CVE-2025-61911 (GCVE-0-2025-61911)

Vulnerability from cvelistv5 – Published: 2025-10-10 22:02 – Updated: 2025-10-14 14:57

Title

python-ldap has sanitization bypass in ldap.filter.escape_filter_chars

Summary

python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, the sanitization method `ldap.filter.escape_filter_chars` can be tricked to skip escaping of special characters when a crafted `list` or `dict` is supplied as the `assertion_value` parameter, and the non-default `escape_mode=1` is configured. The method `ldap.filter.escape_filter_chars` supports 3 different escaping modes. `escape_mode=0` (default) and `escape_mode=2` happen to raise exceptions when a `list` or `dict` object is supplied as the `assertion_value` parameter. However, `escape_mode=1` computes without performing adequate logic to ensure a fully escaped return value. If an application relies on the vulnerable method in the `python-ldap` library to escape untrusted user input, an attacker might be able to abuse the vulnerability to launch ldap injection attacks which could potentially disclose or manipulate ldap data meant to be inaccessible to them. Version 3.4.5 fixes the issue by adding a type check at the start of the `ldap.filter.escape_filter_chars` method to raise an exception when the supplied `assertion_value` parameter is not of type `str`.

Severity

5.5 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-14 14:57 UTC

CWE

CWE-75 - Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)
CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/python-ldap/python-ldap/securi…	x_refsource_CONFIRM
https://github.com/python-ldap/python-ldap/commit…	x_refsource_MISC
https://github.com/python-ldap/python-ldap/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
python-ldap	python-ldap	Affected: < 3.4.5

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-61911",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-14T14:57:26.403796Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-14T14:57:34.174Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "python-ldap",
          "vendor": "python-ldap",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.4.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "python-ldap is a lightweight directory access protocol (LDAP) client API for Python. In versions prior to 3.4.5, the sanitization method `ldap.filter.escape_filter_chars` can be tricked to skip escaping of special characters when a crafted `list` or `dict` is supplied as the `assertion_value` parameter, and the non-default `escape_mode=1` is configured. The method `ldap.filter.escape_filter_chars` supports 3 different escaping modes. `escape_mode=0` (default) and `escape_mode=2` happen to raise exceptions when a `list` or `dict` object is supplied as the `assertion_value` parameter. However, `escape_mode=1` computes without performing adequate logic to ensure a fully escaped return value. If an application relies on the vulnerable method in the `python-ldap` library to escape untrusted user input, an attacker might be able to abuse the vulnerability to launch ldap injection attacks which could potentially disclose or manipulate ldap data meant to be inaccessible to them. Version 3.4.5 fixes the issue by adding a type check at the start of the `ldap.filter.escape_filter_chars` method to raise an exception when the supplied `assertion_value` parameter is not of type `str`."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
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            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
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            "vulnIntegrityImpact": "LOW"
          }
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      ],
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              "cweId": "CWE-75",
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              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "CWE-843: Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en",
              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-10T22:02:15.529Z",
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      "references": [
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          ],
          "url": "https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r7r6-cc7p-4v5m"
        },
        {
          "name": "https://github.com/python-ldap/python-ldap/commit/3957526fb1852e84b90f423d9fef34c7af25b85a",
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          ],
          "url": "https://github.com/python-ldap/python-ldap/commit/3957526fb1852e84b90f423d9fef34c7af25b85a"
        },
        {
          "name": "https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/python-ldap/python-ldap/releases/tag/python-ldap-3.4.5"
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      ],
      "source": {
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  },
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}

Find a vulnerability

Search criteria

2 vulnerabilities found for python-ldap by python-ldap

CVE-2025-61912 (GCVE-0-2025-61912)

CVE-2025-61911 (GCVE-0-2025-61911)