rhsa-2021_4404
Vulnerability from csaf_redhat
Published
2021-11-09 17:48
Modified
2024-11-22 16:56
Summary
Red Hat Security Advisory: kexec-tools security, bug fix, and enhancement update

Notes

Topic
An update for kexec-tools is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. 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 kexec-tools packages contain the /sbin/kexec binary and utilities that together form the user-space component of the kernel's kexec feature. The /sbin/kexec binary facilitates a new kernel to boot using the kernel's kexec feature either on a normal or a panic reboot. The kexec fastboot mechanism allows booting a Linux kernel from the context of an already running kernel. Security Fix(es): * kexec-tools: incorrect permissions on kdump dmesg file (CVE-2021-20269) 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. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from 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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  "vulnerabilities": [
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      "cve": "CVE-2021-20269",
      "cwe": {
        "id": "CWE-276",
        "name": "Incorrect Default Permissions"
      },
      "discovery_date": "2021-03-02T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1934261"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kexec-tools: incorrect permissions on kdump dmesg file",
          "title": "Vulnerability summary"
        },
        {
          "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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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-20269"
        },
        {
          "category": "external",
          "summary": "RHBZ#1934261",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1934261"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-20269",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-20269"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-20269",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20269"
        }
      ],
      "release_date": "2021-03-02T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-11-09T17:48:19+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",
          "product_ids": [
            "BaseOS-8.5.0.GA:kexec-tools-0:2.0.20-57.el8.aarch64",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:4404"
        },
        {
          "category": "workaround",
          "details": "The kexec service can be disabled until the kexec-tools package are updated on the system. No reboot is required for these changes to take effect.",
          "product_ids": [
            "BaseOS-8.5.0.GA:kexec-tools-0:2.0.20-57.el8.aarch64",
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kexec-tools: incorrect permissions on kdump dmesg file"
    }
  ]
}


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