rhsa-2021_1783
Vulnerability from csaf_redhat
Published
2021-05-18 14:11
Modified
2024-11-22 15:53
Summary
Red Hat Security Advisory: tigervnc security, bug fix, and enhancement update

Notes

Topic
An update for tigervnc is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. 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
Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients. The following packages have been upgraded to a later upstream version: tigervnc (1.11.0). (BZ#1880985) Security Fix(es): * tigervnc: certificate exceptions stored as authorities (CVE-2020-26117) 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.


To clipboard 

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      "cve": "CVE-2020-26117",
      "cwe": {
        "id": "CWE-296",
        "name": "Improper Following of a Certificate\u0027s Chain of Trust"
      },
      "discovery_date": "2020-09-19T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1882841"
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        {
          "category": "description",
          "text": "In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate exceptions. They store the certificates as authorities, meaning that the owner of a certificate could impersonate any server after a client had added an exception.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "tigervnc: certificate exceptions stored as authorities",
          "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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            "AppStream-8.4.0.GA:tigervnc-server-minimal-0:1.11.0-6.el8.ppc64le",
            "AppStream-8.4.0.GA:tigervnc-server-minimal-0:1.11.0-6.el8.s390x",
            "AppStream-8.4.0.GA:tigervnc-server-minimal-0:1.11.0-6.el8.x86_64",
            "AppStream-8.4.0.GA:tigervnc-server-minimal-debuginfo-0:1.11.0-6.el8.aarch64",
            "AppStream-8.4.0.GA:tigervnc-server-minimal-debuginfo-0:1.11.0-6.el8.ppc64le",
            "AppStream-8.4.0.GA:tigervnc-server-minimal-debuginfo-0:1.11.0-6.el8.s390x",
            "AppStream-8.4.0.GA:tigervnc-server-minimal-debuginfo-0:1.11.0-6.el8.x86_64",
            "AppStream-8.4.0.GA:tigervnc-server-module-0:1.11.0-6.el8.aarch64",
            "AppStream-8.4.0.GA:tigervnc-server-module-0:1.11.0-6.el8.ppc64le",
            "AppStream-8.4.0.GA:tigervnc-server-module-0:1.11.0-6.el8.s390x",
            "AppStream-8.4.0.GA:tigervnc-server-module-0:1.11.0-6.el8.x86_64",
            "AppStream-8.4.0.GA:tigervnc-server-module-debuginfo-0:1.11.0-6.el8.aarch64",
            "AppStream-8.4.0.GA:tigervnc-server-module-debuginfo-0:1.11.0-6.el8.ppc64le",
            "AppStream-8.4.0.GA:tigervnc-server-module-debuginfo-0:1.11.0-6.el8.s390x",
            "AppStream-8.4.0.GA:tigervnc-server-module-debuginfo-0:1.11.0-6.el8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "tigervnc: certificate exceptions stored as authorities"
    }
  ]
}


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