Vulnerability-Lookup

OESA-2026-1248 (CVE-2025-61912)

Vulnerability from osv_openeuler – Published: 2026-01-30 11:10 – Updated: 2026-08-06 11:10 – Source website

Summary

python-ldap security update

Details

python-ldap: python-ldap provides an object-oriented API to access LDAP directory servers from Python programs. Mainly it wraps the OpenLDAP 2.x libs for that purpose. Additionally the package contains modules for other LDAP-related stuff (e.g. processing LDIF, LDAPURLs, LDAPv3 schema, LDAPv3 extended operations and controls, etc.).

Security Fix(es):

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.(CVE-2025-61912)

Severity

5.3 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-61912	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-ldap-debuginfo-3.4.4-3.oe2403sp1.aarch64.rpm",
          "python-ldap-debugsource-3.4.4-3.oe2403sp1.aarch64.rpm",
          "python3-ldap-3.4.4-3.oe2403sp1.aarch64.rpm"
        ],
        "noarch": [
          "python-ldap-help-3.4.4-3.oe2403sp1.noarch.rpm"
        ],
        "src": [
          "python-ldap-3.4.4-3.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "python-ldap-debuginfo-3.4.4-3.oe2403sp1.x86_64.rpm",
          "python-ldap-debugsource-3.4.4-3.oe2403sp1.x86_64.rpm",
          "python3-ldap-3.4.4-3.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "python-ldap",
        "purl": "pkg:rpm/openEuler/python-ldap\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.4-3.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "python-ldap:   python-ldap provides an object-oriented API to access LDAP directory servers   from Python programs. Mainly it wraps the OpenLDAP 2.x libs for that purpose.   Additionally the package contains modules for other LDAP-related stuff   (e.g. processing LDIF, LDAPURLs, LDAPv3 schema, LDAPv3 extended operations   and controls, etc.).\r\n\r\nSecurity Fix(es):\n\npython-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.(CVE-2025-61912)",
  "id": "OESA-2026-1248",
  "modified": "2026-08-06T11:10:16Z",
  "published": "2026-01-30T11:10:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1248"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61912"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python-ldap security update",
  "upstream": [
    "CVE-2025-61912"
  ]
}

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

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"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-14T14:57:58.750366Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "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",
              "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, 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": [
        {
          "descriptions": [
            {
              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-170",
              "description": "CWE-170: Improper Null Termination",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-10T22:04:25.028Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "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",
    "dateUpdated": "2025-10-14T14:58:06.682Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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