Out-of-bounds Write Affecting libx11 package, versions <2:1.6.4-3+deb9u1


0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 7.42% (94th percentile)
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NVD
9.8 critical
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SUSE
8.8 high
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Red Hat
8.1 high

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  • Snyk ID SNYK-DEBIAN9-LIBX11-339138
  • published 25 Sep 2018
  • disclosed 24 Aug 2018

How to fix?

Upgrade Debian:9 libx11 to version 2:1.6.4-3+deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libx11 package and not the libx11 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.