rhsa-2021_1679
Vulnerability from csaf_redhat
Published
2021-05-18 13:25
Modified
2024-09-16 05:11
Summary
Red Hat Security Advisory: bash security and bug fix update

Notes

Topic
An update for bash 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 bash packages provide Bash (Bourne-again shell), which is the default shell for Red Hat Enterprise Linux. Security Fix(es): * bash: when effective UID is not equal to its real UID the saved UID is not dropped (CVE-2019-18276) 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 8.4 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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      "cwe": {
        "id": "CWE-271",
        "name": "Privilege Dropping / Lowering Errors"
      },
      "discovery_date": "2019-11-29T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1778309"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A privilege escalation vulnerability was found in bash in the way it dropped privileges when started with an effective user id not equal to the real user id. Bash may be vulnerable to this flaw if the setuid permission is set and the owner of the bash program itself is a non-root user. A local attacker could exploit this flaw to escalate their privileges on the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bash: when effective UID is not equal to its real UID the saved UID is not dropped",
          "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"
        }
      ],
      "product_status": {
        "fixed": [
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          "BaseOS-8.4.0.GA:bash-doc-0:4.4.19-14.el8.s390x",
          "BaseOS-8.4.0.GA:bash-doc-0:4.4.19-14.el8.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-18276"
        },
        {
          "category": "external",
          "summary": "RHBZ#1778309",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1778309"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-18276",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-18276"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-18276",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-18276"
        }
      ],
      "release_date": "2019-07-01T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "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-8.4.0.GA:bash-0:4.4.19-14.el8.aarch64",
            "BaseOS-8.4.0.GA:bash-0:4.4.19-14.el8.ppc64le",
            "BaseOS-8.4.0.GA:bash-0:4.4.19-14.el8.s390x",
            "BaseOS-8.4.0.GA:bash-0:4.4.19-14.el8.src",
            "BaseOS-8.4.0.GA:bash-0:4.4.19-14.el8.x86_64",
            "BaseOS-8.4.0.GA:bash-debuginfo-0:4.4.19-14.el8.aarch64",
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            "BaseOS-8.4.0.GA:bash-doc-0:4.4.19-14.el8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:1679"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "BaseOS-8.4.0.GA:bash-0:4.4.19-14.el8.aarch64",
            "BaseOS-8.4.0.GA:bash-0:4.4.19-14.el8.ppc64le",
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            "BaseOS-8.4.0.GA:bash-doc-0:4.4.19-14.el8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "bash: when effective UID is not equal to its real UID the saved UID is not dropped"
    }
  ]
}


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