USN-6088-2 (UBUNTU-CVE-2019-19921)

Vulnerability from osv_ubuntu – Published: 2023-05-23 14:07 – Updated: 2026-06-25 10:46 – Source website
VLAI
Summary
runc vulnerabilities
Details

USN-6088-1 fixed vulnerabilities in runC. This update provides the corresponding updates for Ubuntu 16.04 LTS.

It was discovered that runC incorrectly performed access control when mounting /proc to non-directories. An attacker could possibly use this issue to escalate privileges. (CVE-2019-19921)

Felix Wilhelm discovered that runC incorrecly handled netlink messages. An attacker could possibly use this issue to escalate privileges. (CVE-2021-43784)

Andrew G. Morgan discovered that runC incorrectly set inherited process capabilities inside the container. An attacker could possibly use this issue to escalate privileges. (CVE-2022-29162)

Original advisory details:

It was discovered that runC incorrectly made /sys/fs/cgroup writable when in rootless mode. An attacker could possibly use this issue to escalate privileges. (CVE-2023-25809)

It was discovered that runC incorrectly performed access control when mounting /proc to non-directories. An attacker could possibly use this issue to escalate privileges. (CVE-2023-27561)

It was discovered that runC incorrectly handled /proc and /sys mounts inside a container. An attacker could possibly use this issue to bypass AppArmor, and potentially SELinux. (CVE-2023-28642)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2019-19921",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-43784",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-29162",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-25809",
              "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"
                }
              ]
            },
            {
              "id": "CVE-2023-27561",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-28642",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "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"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-6088-1 fixed vulnerabilities in runC. This update provides\nthe corresponding updates for Ubuntu 16.04 LTS.\n\nIt was discovered that runC incorrectly performed access control when\nmounting /proc to non-directories. An attacker could possibly use\nthis issue to escalate privileges.\n(CVE-2019-19921)\n\nFelix Wilhelm discovered that runC incorrecly handled netlink \nmessages. An attacker could possibly use\nthis issue to escalate privileges. (CVE-2021-43784)\n\nAndrew G. Morgan discovered that runC incorrectly set\ninherited process capabilities inside the container.\nAn attacker could possibly use this issue to\nescalate privileges. (CVE-2022-29162)\n\nOriginal advisory details:\n\n It was discovered that runC incorrectly made /sys/fs/cgroup\n writable when in rootless mode. An attacker could possibly\n use this issue to escalate privileges. (CVE-2023-25809)\n \n It was discovered that runC incorrectly performed access control when\n mounting /proc to non-directories. An attacker could possibly use\n this issue to escalate privileges. (CVE-2023-27561)\n \n It was discovered that runC incorrectly handled /proc and \n /sys mounts inside a container. An attacker could possibly\n use this issue to bypass AppArmor, and potentially SELinux.\n (CVE-2023-28642)\n",
  "id": "USN-6088-2",
  "modified": "2026-06-25T10:46:13Z",
  "published": "2023-05-23T14:07:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6088-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-19921"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-43784"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-29162"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-25809"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-27561"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-28642"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "runc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2019-19921",
    "UBUNTU-CVE-2021-43784",
    "UBUNTU-CVE-2022-29162",
    "UBUNTU-CVE-2023-25809",
    "UBUNTU-CVE-2023-27561",
    "UBUNTU-CVE-2023-28642"
  ]
}



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