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Buffer Over-read Affecting xorg-server package, versions <21.1.12-r0

Severity

 Recommended
low

Based on default assessment until relevant scores are available

    Threat Intelligence

    EPSS
    0.05% (19th percentile)

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  • Snyk ID SNYK-ALPINE320-XORGSERVER-7015103
  • published 23 May 2024
  • disclosed 4 Apr 2024
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Introduced: 4 Apr 2024

CVE-2024-31081 Open this link in a new tab
CWE-126 Open this link in a new tab

How to fix?

Upgrade Alpine:3.20 xorg-server to version 21.1.12-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-server package and not the xorg-server package as distributed by Alpine. See How to fix? for Alpine:3.20 relevant fixed versions and status.

A heap-based buffer over-read vulnerability was found in the X.org server's ProcXIPassiveGrabDevice() function. This issue occurs when byte-swapped length values are used in replies, potentially leading to memory leakage and segmentation faults, particularly when triggered by a client with a different endianness. This vulnerability could be exploited by an attacker to cause the X server to read heap memory values and then transmit them back to the client until encountering an unmapped page, resulting in a crash. Despite the attacker's inability to control the specific memory copied into the replies, the small length values typically stored in a 32-bit integer can result in significant attempted out-of-bounds reads.

References

CVSS Scores

version 3.1
Expand this section

SUSE

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

Red Hat

7.3 high