CVE-2018-15858

Unchecked NULL pointer usage when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 2.1 LOW

5.5^/10

CVSS v3.0 : MEDIUM

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

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

2.1^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html	Mailing List Patch Third Party Advisory
https://github.com/xkbcommon/libxkbcommon/commit/badb428e63387140720f22486b3acbd3d738859f	Patch Third Party Advisory
https://usn.ubuntu.com/3786-1/	Third Party Advisory
https://security.gentoo.org/glsa/201810-05	Third Party Advisory
https://usn.ubuntu.com/3786-2/	Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:xkbcommon:xkbcommon::::::::
	cpe:2.3:a:xkbcommon:libxkbcommon::::::::

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::

Information

Published : 2018-08-25 14:29

Updated : 2019-03-19 10:34

NVD link : CVE-2018-15858

Mitre link : CVE-2018-15858

JSON object : View

CWE

CWE-476

NULL Pointer Dereference

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Products Affected

canonical

ubuntu_linux

xkbcommon

libxkbcommon
xkbcommon

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