msrc_cve-2023-28320
Vulnerability from csaf_microsoft
Published
2023-05-01 00:00
Modified
2024-08-18 00:00
Summary
A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backends for resolving host names selected at build time. If it is built to use the synchronous resolver it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave.

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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{
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        "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.",
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  "vulnerabilities": [
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        "name": "Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)"
      },
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          "title": "Assigning CNA"
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          "summary": "CVE-2023-28320 A denial of service vulnerability exists in curl \u003cv8.1.0 in the way libcurl provides several different backends for resolving host names selected at build time. If it is built to use the synchronous resolver it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave. - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2023/msrc_cve-2023-28320.json"
        }
      ],
      "remediations": [
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        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalsScore": 0.0,
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.9,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "17086-5",
            "17086-4",
            "17084-11",
            "17084-8",
            "17084-10",
            "17084-6"
          ]
        }
      ],
      "title": "A denial of service vulnerability exists in curl \u003cv8.1.0 in the way libcurl provides several different backends for resolving host names selected at build time. If it is built to use the synchronous resolver it allows name resolves to time-out slow operations using `alarm()` and `siglongjmp()`. When doing this libcurl used a global buffer that was not mutex protected and a multi-threaded application might therefore crash or otherwise misbehave."
    }
  ]
}


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