msrc_cve-2021-27212
Vulnerability from csaf_microsoft
Published
2021-02-02 00:00
Modified
2021-12-16 00:00
Summary
In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.

Notes

Additional Resources
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer
The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.


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{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2021-27212 In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-27212.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.",
    "tracking": {
      "current_release_date": "2021-12-16T00:00:00.000Z",
      "generator": {
        "date": "2025-10-19T21:43:39.677Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-27212",
      "initial_release_date": "2021-02-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-02-24T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2021-12-16T00:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added openldap to CBL-Mariner 2.0"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "1.0",
                "product": {
                  "name": "CBL Mariner 1.0 x64",
                  "product_id": "12137"
                }
              },
              {
                "category": "product_version",
                "name": "1.0",
                "product": {
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                }
              },
              {
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                }
              },
              {
                "category": "product_version",
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                "product": {
                  "name": "CBL Mariner 2.0 ARM",
                  "product_id": "12140"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
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          "product_id": "12137-8"
        },
        "product_reference": "8",
        "relates_to_product_reference": "12137"
      },
      {
        "category": "default_component_of",
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        },
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      },
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        },
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      },
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      },
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        },
        "product_reference": "6",
        "relates_to_product_reference": "12138"
      },
      {
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      },
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        },
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      },
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      },
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        },
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      },
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      },
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        },
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      },
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        },
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        "relates_to_product_reference": "12140"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-27212",
      "cwe": {
        "id": "CWE-617",
        "name": "Reachable Assertion"
      },
      "notes": [
        {
          "category": "general",
          "text": "mitre",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "13462-12137",
          "13463-12137",
          "13464-12138",
          "13465-12138",
          "13466-12139",
          "13467-12139",
          "13468-12140",
          "13469-12140"
        ],
        "known_affected": [
          "12137-8",
          "12137-7",
          "12138-6",
          "12138-5",
          "12139-4",
          "12139-3",
          "12140-2",
          "12140-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-27212 In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-27212.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-02-24T00:00:00.000Z",
          "details": "2.4.57-2:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "12137-8",
            "12137-7",
            "12138-6",
            "12138-5"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        },
        {
          "category": "vendor_fix",
          "date": "2021-02-24T00:00:00.000Z",
          "details": "2.4.57-6:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "12139-4",
            "12139-3",
            "12140-2",
            "12140-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "12137-8",
            "12137-7",
            "12138-6",
            "12138-5",
            "12139-4",
            "12139-3",
            "12140-2",
            "12140-1"
          ]
        }
      ],
      "title": "In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime."
    }
  ]
}


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