Integer Underflow Affecting xorg-server-hwe-16.04 package, versions <2:1.19.6-1ubuntu4.1~16.04.6


Severity

Recommended
medium

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.04% (11th percentile)

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  • Snyk ID SNYK-UBUNTU1604-XORGSERVERHWE1604-1245452
  • published 14 Apr 2021
  • disclosed 26 Apr 2021

How to fix?

Upgrade Ubuntu:16.04 xorg-server-hwe-16.04 to version 2:1.19.6-1ubuntu4.1~16.04.6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xorg-server-hwe-16.04 package and not the xorg-server-hwe-16.04 package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

References

CVSS Scores

version 3.1
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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
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Red Hat

7.8 high
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SUSE

7.8 high