Vulnerability from bitnami_vulndb
Published
2025-08-11 15:33
Modified
2025-11-06 13:25
Summary
Tarfile infinite loop during parsing with negative member offset
Details

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.

This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "libpython",
        "purl": "pkg:bitnami/libpython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.9.24"
            },
            {
              "introduced": "3.10.0"
            },
            {
              "fixed": "3.10.19"
            },
            {
              "introduced": "3.11.0"
            },
            {
              "fixed": "3.11.14"
            },
            {
              "introduced": "3.12.0"
            },
            {
              "fixed": "3.12.12"
            },
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "3.13.6"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-8194"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "There is a defect in the CPython \u201ctarfile\u201d module affecting the \u201cTarFile\u201d extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. \n\nThis vulnerability can be mitigated by including the following patch after importing the \u201ctarfile\u201d module:\u00a0 https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1",
  "id": "BIT-libpython-2025-8194",
  "modified": "2025-11-06T13:25:46.476Z",
  "published": "2025-08-11T15:33:34.813Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/130577"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/137027"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-8194"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/07/28/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2025/07/28/2"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Tarfile infinite loop during parsing with negative member offset"
}


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  • 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 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.