ubuntu-cve-2023-25809
Vulnerability from osv_ubuntu
Published
2023-03-29 19:15
Modified
2025-09-08 16:56
Summary
Details

runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes /sys/fs/cgroup writable in following conditons: 1. when runc is executed inside the user namespace, and the config.json does not specify the cgroup namespace to be unshared (e.g.., (docker|podman|nerdctl) run --cgroupns=host, with Rootless Docker/Podman/nerdctl) or 2. when runc is executed outside the user namespace, and /sys is mounted with rbind, ro (e.g., runc spec --rootless; this condition is very rare). A container may gain the write access to user-owned cgroup hierarchy /sys/fs/cgroup/user.slice/... on the host . Other users's cgroup hierarchies are not affected. Users are advised to upgrade to version 1.1.5. Users unable to upgrade may unshare the cgroup namespace ((docker|podman|nerdctl) run --cgroupns=private). This is the default behavior of Docker/Podman/nerdctl on cgroup v2 hosts. or add /sys/fs/cgroup to maskedPaths.

Severity
6.3 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
5.0 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"
          },
          {
            "binary_name": "runc",
            "binary_version": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0.8+dfsg-2",
        "0.1.1-0ubuntu5~16.04",
        "1.0.0~rc1-0ubuntu1~16.04",
        "1.0.0~rc1-0ubuntu2~16.04.1",
        "1.0.0~rc1-0ubuntu2~16.04.1.1",
        "1.0.0~rc2-0ubuntu2~16.04.1",
        "1.0.0~rc2+docker1.12.6-0ubuntu1~16.04.1",
        "1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.1",
        "1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.3",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.4-0ubuntu1~18.04.2"
          },
          {
            "binary_name": "runc",
            "binary_version": "1.1.4-0ubuntu1~18.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.4-0ubuntu1~18.04.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.4-0ubuntu1~18.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~rc2+docker1.13.1-0ubuntu1",
        "1.0.0~rc4+dfsg1-2",
        "1.0.0~rc4+dfsg1-6",
        "1.0.0~rc4+dfsg1-6ubuntu0.18.04.1",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.1",
        "1.0.0~rc7+git20190403.029124da-0ubuntu1~18.04.2",
        "1.0.0~rc10-0ubuntu1~18.04.1",
        "1.0.0~rc10-0ubuntu1~18.04.2",
        "1.0.0~rc93-0ubuntu1~18.04.1",
        "1.0.0~rc93-0ubuntu1~18.04.2",
        "1.0.0~rc95-0ubuntu1~18.04.1",
        "1.0.0~rc95-0ubuntu1~18.04.2",
        "1.0.1-0ubuntu2~18.04.1",
        "1.1.0-0ubuntu1~18.04.1",
        "1.1.4-0ubuntu1~18.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.4-0ubuntu1~20.04.3"
          },
          {
            "binary_name": "runc",
            "binary_version": "1.1.4-0ubuntu1~20.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.4-0ubuntu1~20.04.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.4-0ubuntu1~20.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~rc8+git20190923.3e425f80-0ubuntu1",
        "1.0.0~rc10-0ubuntu1",
        "1.0.0~rc93-0ubuntu1~20.04.1",
        "1.0.0~rc93-0ubuntu1~20.04.2",
        "1.0.0~rc95-0ubuntu1~20.04.1",
        "1.0.0~rc95-0ubuntu1~20.04.2",
        "1.0.1-0ubuntu2~20.04.1",
        "1.1.0-0ubuntu1~20.04.1",
        "1.1.0-0ubuntu1~20.04.2",
        "1.1.4-0ubuntu1~20.04.1",
        "1.1.4-0ubuntu1~20.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "golang-github-opencontainers-runc-dev",
            "binary_version": "1.1.4-0ubuntu1~22.04.3"
          },
          {
            "binary_name": "runc",
            "binary_version": "1.1.4-0ubuntu1~22.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "runc",
        "purl": "pkg:deb/ubuntu/runc@1.1.4-0ubuntu1~22.04.3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.4-0ubuntu1~22.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.1-0ubuntu2",
        "1.0.1-0ubuntu3",
        "1.0.3-0ubuntu1",
        "1.1.0-0ubuntu1",
        "1.1.0-0ubuntu1.1",
        "1.1.4-0ubuntu1~22.04.1",
        "1.1.4-0ubuntu1~22.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes `/sys/fs/cgroup` writable in following conditons: 1. when runc is executed inside the user namespace, and the `config.json` does not specify the cgroup namespace to be unshared (e.g.., `(docker|podman|nerdctl) run --cgroupns=host`, with Rootless Docker/Podman/nerdctl) or 2. when runc is executed outside the user namespace, and `/sys` is mounted with `rbind, ro` (e.g., `runc spec --rootless`; this condition is very rare). A container may gain the write access to user-owned cgroup hierarchy `/sys/fs/cgroup/user.slice/...` on the host . Other users\u0027s cgroup hierarchies are not affected. Users are advised to upgrade to version 1.1.5. Users unable to upgrade may unshare the cgroup namespace (`(docker|podman|nerdctl) run --cgroupns=private)`. This is the default behavior of Docker/Podman/nerdctl on cgroup v2 hosts. or add `/sys/fs/cgroup` to `maskedPaths`.",
  "id": "UBUNTU-CVE-2023-25809",
  "modified": "2025-09-08T16:56:10Z",
  "published": "2023-03-29T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-25809"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-m8cg-xc2p-r3fc"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/opencontainers/runc/commit/0e6b818a2b0d24fdb6697614e5c5f115bbe8e3a5"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6088-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6088-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-25809"
    }
  ],
  "related": [
    "USN-6088-1",
    "USN-6088-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-25809"
  ]
}



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