MSRC_CVE-2021-22923

Vulnerability from csaf_microsoft - Published: 2021-08-02 00:00 - Updated: 2021-12-16 00:00
Summary
When curl is instructed to get content using the metalink feature and a user name and password are used to download the metalink XML file those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user's expectations and intentions and without telling the user it happened.

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-2021-22923 When curl is instructed to get content using the metalink feature and a user name and password are used to download the metalink XML file those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user\u0027s expectations and intentions and without telling the user it happened. - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-22923.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": "When curl is instructed to get content using the metalink feature and a user name and password are used to download the metalink XML file those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user\u0027s expectations and intentions and without telling the user it happened.",
    "tracking": {
      "current_release_date": "2021-12-16T00:00:00.000Z",
      "generator": {
        "date": "2025-10-19T22:09:27.536Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2021-22923",
      "initial_release_date": "2021-08-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2021-08-14T00:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        },
        {
          "date": "2021-12-16T00:00:00.000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added curl 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",
                  "product_id": "16820"
                }
              },
              {
                "category": "product_version",
                "name": "2.0",
                "product": {
                  "name": "CBL Mariner 2.0",
                  "product_id": "17086"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003ccm1 curl 7.76.0-5",
                "product": {
                  "name": "\u003ccm1 curl 7.76.0-5",
                  "product_id": "2"
                }
              },
              {
                "category": "product_version",
                "name": "cm1 curl 7.76.0-5",
                "product": {
                  "name": "cm1 curl 7.76.0-5",
                  "product_id": "19008"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003ccbl2 curl 7.76.0-5",
                "product": {
                  "name": "\u003ccbl2 curl 7.76.0-5",
                  "product_id": "1"
                }
              },
              {
                "category": "product_version",
                "name": "cbl2 curl 7.76.0-5",
                "product": {
                  "name": "cbl2 curl 7.76.0-5",
                  "product_id": "19009"
                }
              }
            ],
            "category": "product_name",
            "name": "curl"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccm1 curl 7.76.0-5 as a component of CBL Mariner 1.0",
          "product_id": "16820-2"
        },
        "product_reference": "2",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cm1 curl 7.76.0-5 as a component of CBL Mariner 1.0",
          "product_id": "19008-16820"
        },
        "product_reference": "19008",
        "relates_to_product_reference": "16820"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "\u003ccbl2 curl 7.76.0-5 as a component of CBL Mariner 2.0",
          "product_id": "17086-1"
        },
        "product_reference": "1",
        "relates_to_product_reference": "17086"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cbl2 curl 7.76.0-5 as a component of CBL Mariner 2.0",
          "product_id": "19009-17086"
        },
        "product_reference": "19009",
        "relates_to_product_reference": "17086"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-22923",
      "cwe": {
        "id": "CWE-319",
        "name": "Cleartext Transmission of Sensitive Information"
      },
      "notes": [
        {
          "category": "general",
          "text": "hackerone",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "fixed": [
          "19008-16820",
          "19009-17086"
        ],
        "known_affected": [
          "16820-2",
          "17086-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2021-22923 When curl is instructed to get content using the metalink feature and a user name and password are used to download the metalink XML file those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user\u0027s expectations and intentions and without telling the user it happened. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-22923.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-08-14T00:00:00.000Z",
          "details": "7.76.0-5:Security Update:https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade",
          "product_ids": [
            "16820-2",
            "17086-1"
          ],
          "url": "https://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.3,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "16820-2",
            "17086-1"
          ]
        }
      ],
      "title": "When curl is instructed to get content using the metalink feature and a user name and password are used to download the metalink XML file those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user\u0027s expectations and intentions and without telling the user it happened."
    }
  ]
}


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Sightings

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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