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Out-of-bounds Write Affecting tigervnc-selinux package, versions <0:1.13.1-2.el8_9.7.alma.1

Severity

 Recommended
high

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.4% (75th percentile)

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  • Snyk ID SNYK-ALMALINUX8-TIGERVNCSELINUX-6219809
  • published 31 Jan 2024
  • disclosed 30 Apr 2024
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Introduced: 31 Jan 2024

CVE-2023-6816 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:8 tigervnc-selinux to version 0:1.13.1-2.el8_9.7.alma.1 or higher.
This issue was patched in ALSA-2024:0607.

NVD Description

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

A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap overflow if a bigger value was used.

References

CVSS Scores

version 3.1
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NVD

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

SUSE

8.4 high
Expand this section

Red Hat

9.8 critical