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CVE-2015-8316

Published: 6 September 2017

Array index error in LightDM (aka Light Display Manager) 1.14.3, 1.16.x before 1.16.6 when the XDMCP server is enabled allows remote attackers to cause a denial of service (process crash) via an XDMCP request packet with no address.

Notes

AuthorNote
mdeslaur
introduced in 1.14.3 and 1.15.1 by the following commits:
http://bazaar.launchpad.net/~lightdm-team/lightdm/1.14/revision/2143
http://bazaar.launchpad.net/~lightdm-team/lightdm/1.16/revision/2155
fixed in 1.14.4, 1.16.6 and 1.17.2

Priority

Low

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
lightdm
Launchpad, Ubuntu, Debian
precise Not vulnerable
(1.14/1.16 only)
trusty Does not exist
(trusty was not-affected [1.14/1.16 only])
upstream
Released (1.14.4,1.16.6,1.17.2)
wily Ignored
(end of life)
xenial Not vulnerable
(1.17.2-0ubuntu1)
vivid Not vulnerable
(1.14.2-0ubuntu1.1)
Patches:
upstream: https://bazaar.launchpad.net/~lightdm-team/lightdm/1.14/revision/2166 (1.14.x)
upstream: https://bazaar.launchpad.net/~lightdm-team/lightdm/1.16/revision/2207 (1.16.x)

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H