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Use After Free Affecting tigervnc package, versions <0:1.12.0-9.el8_7.1

Severity

 Recommended
0.0
high
0
10

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.15% (53rd percentile)

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  • Snyk ID SNYK-ALMALINUX8-TIGERVNC-5609436
  • published 28 May 2023
  • disclosed 9 May 2023
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Introduced: 9 May 2023

CVE-2023-0494 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:8 tigervnc to version 0:1.12.0-9.el8_7.1 or higher.
This issue was patched in ALSA-2023:0662.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tigervnc package and not the tigervnc 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 issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.

References

CVSS Scores

version 3.1
Expand this section

NVD

7.8 high
  • Attack Vector (AV)
    Local
  • 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

7.8 high
Expand this section

Red Hat

7.8 high