GHSA-C72P-9XMJ-RX3W

Vulnerability from github – Published: 2021-07-26 21:17 – Updated: 2024-01-31 15:31
VLAI?
Summary
Archive package allows chmod of file outside of unpack target directory
Details

Impact

A bug was found in containerd where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host’s filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process.

Patches

This bug has been fixed in containerd 1.5.4 and 1.4.8. Users should update to these versions as soon as they are released. Running containers do not need to be restarted.

Workarounds

Ensure you only pull images from trusted sources.

Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with unexpected files.

For more information

If you have any questions or comments about this advisory:

  • Open an issue
  • Email us at security@containerd.io if you think you’ve found a security bug.
Severity ?
5.0 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/containerd/containerd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/containerd/containerd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.5.0"
            },
            {
              "fixed": "1.5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-32760"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-668",
      "CWE-732"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-07-22T20:21:14Z",
    "nvd_published_at": "2021-07-19T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "## Impact\n\nA bug was found in containerd where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host\u2019s filesystem.  Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky.  This bug does not directly allow files to be read, modified, or executed without an additional cooperating process.\n\n## Patches\n\nThis bug has been fixed in containerd 1.5.4 and 1.4.8.  Users should update to these versions as soon as they are released.  Running containers do not need to be restarted.\n\n## Workarounds\n\nEnsure you only pull images from trusted sources.\n\nLinux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with unexpected files.\n\n## For more information\n\nIf you have any questions or comments about this advisory:\n\n* [Open an issue](https://github.com/containerd/containerd/issues/new/choose)\n* Email us at security@containerd.io if you think you\u2019ve found a security bug.",
  "id": "GHSA-c72p-9xmj-rx3w",
  "modified": "2024-01-31T15:31:56Z",
  "published": "2021-07-26T21:17:45Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32760"
    },
    {
      "type": "WEB",
      "url": "https://github.com/containerd/containerd/commit/22e9a70c71eff6507be71955947a611f2ed91e6c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/containerd/containerd/commit/7ad08c69e09ee4930a48dbf2aab3cd612458617f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/containerd/containerd"
    },
    {
      "type": "WEB",
      "url": "https://github.com/containerd/containerd/releases/tag/v1.4.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/containerd/containerd/releases/tag/v1.5.4"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6MGXUTRG3Y3"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DDMNDPJJTP3J5GOEDB66F6MGXUTRG3Y3"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202401-31"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Archive package allows chmod of file outside of unpack target directory"
}


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



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