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CVE-2018-14598

Published: 24 August 2018

An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
libx11
Launchpad, Ubuntu, Debian
upstream
Released (1.6.6)
trusty
Released (2:1.6.2-1ubuntu2.1)
xenial
Released (2:1.6.3-1ubuntu2.1)
bionic
Released (2:1.6.4-3ubuntu0.1)
Patches:
other: https://gitlab.freedesktop.org/xorg/lib/libx11/commit/e83722768fd5c467ef61fa159e8c6278770b45c2

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H