CVE-2017-13723 Information

Description

In X.Org Server (aka xserver and xorg-server) before 1.19.4 a local attacker authenticated to the X server could overflow a global buffer causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.debian.org/security/2017/dsa-4000 http://www.openwall.com/lists/oss-security/2017/10/04/10 http://www.securityfocus.com/bid/101253 https://cgit.freedesktop.org/xorg/xserver/commit/?id=94f11ca5cf011ef123bd222cabeaef6f424d76ac https://lists.debian.org/debian-lts-announce/2017/11/msg00032.html https://lists.x.org/archives/xorg-announce/2017-October/002808.html https://security.gentoo.org/glsa/201710-30

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8