ghsa-xjw2-6jm9-rf67
Vulnerability from github
Published
2023-08-30 20:47
Modified
2023-08-30 20:47
Severity ?
8.3 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
Summary
Sandbox escape via various forms of "format".
Details

Impact

Python's "format" functionality allows someone controlling the format string to "read" all objects accessible through recursive attribute lookup and subscription from objects he can access. This can lead to critical information disclosure. With RestrictedPython, the format functionality is available via the format and format_map methods of str (and unicode) (accessed either via the class or its instances) and via string.Formatter. All known versions of RestrictedPython are vulnerable.

Patches

The issue will be fixed in 5.4 and 6.2.

Workarounds

There are no workarounds to fix the issue without upgrading.

References

  • https://docs.python.org/3/library/stdtypes.html#str.format_map
  • http://lucumr.pocoo.org/2016/12/29/careful-with-str-format/
  • https://www.exploit-db.com/exploits/51580

For more information

If you have any questions or comments about this advisory:

Credits

Thanks for analysing and reporting the go to:

  • Abhishek Govindarasu
  • Ankush Menat
  • Ward Theunisse
Show details on source website

To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.3"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "RestrictedPython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.1"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "RestrictedPython"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.0"
            },
            {
              "fixed": "6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-41039"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-08-30T20:47:58Z",
    "nvd_published_at": "2023-08-30T18:15:09Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nPython\u0027s \"format\" functionality allows someone controlling the format string to \"read\" all objects accessible through recursive attribute lookup and subscription from objects he can access. This can lead to critical information disclosure.\nWith `RestrictedPython`, the format functionality is available via the `format` and `format_map` methods of `str` (and `unicode`) (accessed either via the class or its instances) and via `string.Formatter`.\nAll known versions of `RestrictedPython` are vulnerable. \n\n### Patches\nThe issue will be fixed in 5.4 and 6.2.\n\n### Workarounds\nThere are no workarounds to fix the issue without upgrading.\n\n### References\n* https://docs.python.org/3/library/stdtypes.html#str.format_map\n* http://lucumr.pocoo.org/2016/12/29/careful-with-str-format/\n* https://www.exploit-db.com/exploits/51580\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in the [RestrictedPython issue tracker](https://github.com/zopefoundation/RestrictedPython/issues)\n* Email us at [security@plone.org](mailto:security@plone.org)\n\n### Credits\n\nThanks for analysing and reporting the go to:\n\n* Abhishek Govindarasu\n* Ankush Menat\n* Ward Theunisse\n\n",
  "id": "GHSA-xjw2-6jm9-rf67",
  "modified": "2023-08-30T20:47:58Z",
  "published": "2023-08-30T20:47:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zopefoundation/RestrictedPython/security/advisories/GHSA-xjw2-6jm9-rf67"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-41039"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zopefoundation/RestrictedPython/commit/4134aedcff17c977da7717693ed89ce56d54c120"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zopefoundation/RestrictedPython"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Sandbox escape via various forms of \"format\"."
}


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