rhsa-2024_0670
Vulnerability from csaf_redhat
Published
2024-02-02 21:05
Modified
2024-11-06 04:55
Summary
Red Hat Security Advisory: runc security update

Notes

Topic
An update for runc is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime. Security Fix(es): * runc: file descriptor leak (CVE-2024-21626) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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          "text": "A file descriptor leak issue was found in the runc package. While a user performs `O_CLOEXEC` all file descriptors before executing the container code, the file descriptor is open when performing `setcwd(2)`, which means that the reference can be kept alive in the container by configuring the working directory to be a path resolved through the file descriptor. The non-dumpable bit is unset after `execve`, meaning there are multiple ways to attack this other than bad configurations. The only way to defend against it entirely is to close all unneeded file descriptors.",
          "title": "Vulnerability description"
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          "text": "runc: file descriptor leak",
          "title": "Vulnerability summary"
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          "text": "These vulnerabilities not only enable malicious actors to escape containerized environments but also allow for full control over the underlying host system. With the widespread adoption of containerization technologies in both development and production environments, such exploits pose significant risks to data integrity, confidentiality, and system stability.\n\nOpenShift Container Platform ships with SELinux in targeted enforcing mode, which prevents the container processes from accessing host content and mitigates this attack, and disabling SELinux on the Openshift container platform is not supported. Hence, the impact of the Openshift Container Platform is reduced to Moderate.\n\nFor multicluster-engine (MCE) vulnerable versions of buildkit and runc are part of installed version of oc. However, they are not affecting the higher-level assisted-installer binary in MCE. The presence of these dependencies in the container does not imply a security risk to the containerized application itself, as it is based on low-level packages included in the oc binary, and the impact to the container\u0027s core functionality is minimal.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2024-21626"
        },
        {
          "category": "external",
          "summary": "RHBZ#2258725",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2258725"
        },
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          "category": "external",
          "summary": "RHSB-2024-001",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2024-001"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2024-21626",
          "url": "https://www.cve.org/CVERecord?id=CVE-2024-21626"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-21626",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21626"
        },
        {
          "category": "external",
          "summary": "https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv",
          "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv"
        }
      ],
      "release_date": "2024-01-31T20:01:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2024-02-02T21:05:26+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2024:0670"
        },
        {
          "category": "workaround",
          "details": "Red Hat Enterprise Linux (RHEL) and OpenShift ships with SELinux in targeted enforcing mode, which prevents the container processes from accessing host content and mitigates this attack. Dockerfiles can be inspected on the \u0027RUN\u0027\u00a0and \u0027WORKDIR\u0027 directives to ensure that there are no escapes or malicious paths, which are an indication of compromise. Limiting access and only using trusted container images can help prevent unauthorized access and malicious attacks.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "runc: file descriptor leak"
    }
  ]
}


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