suse-su-2023:1726-1
Vulnerability from csaf_suse
Published
2023-04-03 08:24
Modified
2023-04-03 08:24
Summary
Security update for runc

Notes

Title of the patch
Security update for runc
Description of the patch
This update for runc fixes the following issues: Update to runc v1.1.5: Security fixes: - CVE-2023-25809: Fixed rootless `/sys/fs/cgroup` is writable when cgroupns isn't unshared (bnc#1209884). - CVE-2023-27561: Fixed regression that reintroduced CVE-2019-19921 vulnerability (bnc#1208962). - CVE-2023-28642: Fixed AppArmor/SELinux bypass with symlinked /proc (bnc#1209888). Other fixes: - Fix the inability to use `/dev/null` when inside a container. - Fix changing the ownership of host's `/dev/null` caused by fd redirection (bsc#1168481). - Fix rare runc exec/enter unshare error on older kernels. - nsexec: Check for errors in `write_log()`. - Drop version-specific Go requirement.
Patchnames
SUSE-2023-1726,SUSE-SLE-Module-Containers-12-2023-1726
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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      "text": "important"
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    "category": "csaf_security_advisory",
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    "distribution": {
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        "title": "Title of the patch"
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        "text": "This update for runc fixes the following issues:\n\nUpdate to runc v1.1.5:\n\nSecurity fixes:\n\n- CVE-2023-25809: Fixed rootless `/sys/fs/cgroup` is writable when cgroupns isn\u0027t unshared (bnc#1209884).\n- CVE-2023-27561: Fixed regression that reintroduced CVE-2019-19921 vulnerability (bnc#1208962).\n- CVE-2023-28642: Fixed AppArmor/SELinux bypass with symlinked /proc (bnc#1209888).\n\nOther fixes:\n\n - Fix the inability to use `/dev/null` when inside a container.\n - Fix changing the ownership of host\u0027s `/dev/null` caused by fd redirection (bsc#1168481).\n - Fix rare runc exec/enter unshare error on older kernels.\n - nsexec: Check for errors in `write_log()`.\n - Drop version-specific Go requirement.\n",
        "title": "Description of the patch"
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        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
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        "title": "Terms of use"
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    "publisher": {
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        "url": "https://www.suse.com/security/cve/CVE-2023-28642/"
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    ],
    "title": "Security update for runc",
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          "summary": "Current version"
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  "vulnerabilities": [
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      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2023-25809"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "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`.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.s390x",
          "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2023-25809",
          "url": "https://www.suse.com/security/cve/CVE-2023-25809"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1209884 for CVE-2023-25809",
          "url": "https://bugzilla.suse.com/1209884"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.ppc64le",
            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.s390x",
            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
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            "baseScore": 2.5,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
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            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.s390x",
            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
          ]
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          "date": "2023-04-03T08:24:06Z",
          "details": "low"
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      "title": "CVE-2023-25809"
    },
    {
      "cve": "CVE-2023-27561",
      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2023-27561"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "runc through 1.1.4 has Incorrect Access Control leading to Escalation of Privileges, related to libcontainer/rootfs_linux.go. To exploit this, an attacker must be able to spawn two containers with custom volume-mount configurations, and be able to run custom images. NOTE: this issue exists because of a CVE-2019-19921 regression.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
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          "url": "https://bugzilla.suse.com/1208962"
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      ],
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          "product_ids": [
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            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
          ]
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      ],
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        {
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            "baseSeverity": "HIGH",
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            "version": "3.1"
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          "products": [
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          "text": "https://www.suse.com/security/cve/CVE-2023-28642"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "runc is a CLI tool for spawning and running containers according to the OCI specification. It was found that AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration. This issue has been fixed in runc version 1.1.5, by prohibiting symlinked `/proc`. See PR #3785 for details. users are advised to upgrade. Users unable to upgrade should avoid using an untrusted container image.",
          "title": "CVE description"
        }
      ],
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          "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.s390x",
          "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
        ]
      },
      "references": [
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          "summary": "CVE-2023-28642",
          "url": "https://www.suse.com/security/cve/CVE-2023-28642"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1209888 for CVE-2023-28642",
          "url": "https://bugzilla.suse.com/1209888"
        }
      ],
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          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.s390x",
            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
          ]
        }
      ],
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            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
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          "products": [
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            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.s390x",
            "SUSE Linux Enterprise Module for Containers 12:runc-1.1.5-16.29.1.x86_64"
          ]
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      "threats": [
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          "category": "impact",
          "date": "2023-04-03T08:24:06Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2023-28642"
    }
  ]
}


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  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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