ghsa-49g5-f6qw-8mm7
Vulnerability from github
Published
2025-10-07 18:31
Modified
2025-10-09 21:31
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Details

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations.

Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-8291"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1285"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-07T18:16:00Z",
    "severity": "MODERATE"
  },
  "details": "The \u0027zipfile\u0027 module would not check the validity of the ZIP64 End of\nCentral Directory (EOCD) Locator record offset value would not be used to\nlocate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be\nassumed to be the previous record in the ZIP archive. This could be abused\nto create ZIP archives that are handled differently by the \u0027zipfile\u0027 module\ncompared to other ZIP implementations.\n\n\nRemediation maintains this behavior, but checks that the offset specified\nin the ZIP64 EOCD Locator record matches the expected value.",
  "id": "GHSA-49g5-f6qw-8mm7",
  "modified": "2025-10-09T21:31:10Z",
  "published": "2025-10-07T18:31:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-8291"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/139700"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/139702"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/162997bb70e067668c039700141770687bc8f267"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/1d29afb0d6218aa8fb5e1e4a6133a4778d89bb46"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/333d4a6f4967d3ace91492a39ededbcf3faa76a6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/76437ac248ad8ca44e9bf697b02b1e2241df2196"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/8392b2f0d35678407d9ce7d95655a5b77de161b4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/bca11ae7d575d87ed93f5dd6a313be6246e3e388"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/d11e69d6203080e3ec450446bfed0516727b85c3"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/QECOPWMTH4VPPJAXAH2BGTA4XADOP62G"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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