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Use After Free Affecting tigervnc-server package, versions <0:1.12.0-15.el8_8

Severity

 Recommended
medium

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    10.43% (96th percentile)

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  • Snyk ID SNYK-ALMALINUX8-TIGERVNCSERVER-5615384
  • published 28 May 2023
  • disclosed 9 May 2023
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Introduced: 9 May 2023

CVE-2022-46343 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:8 tigervnc-server to version 0:1.12.0-15.el8_8 or higher.
This issue was patched in ALSA-2023:2830.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tigervnc-server package and not the tigervnc-server package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

A vulnerability was found in X.Org. This security flaw occurs because the handler for the ScreenSaverSetAttributes request may write to memory after it has been freed. This issue can lead to local privileges elevation on systems where the X server is running privileged and remote code execution for ssh X forwarding sessions.

References

CVSS Scores

version 3.1
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NVD

8.8 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

SUSE

4.4 medium
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Red Hat

8.8 high