Bug 1284574 - (CVE-2015-8316) CVE-2015-8316 lightdm: XDMCP request packet with no addresses crashes LightDM
CVE-2015-8316 lightdm: XDMCP request packet with no addresses crashes LightDM
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20151117,repor...
: Security
Depends On: 1284575
Blocks:
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Reported: 2015-11-23 10:43 EST by Adam Mariš
Modified: 2016-03-24 10:36 EDT (History)
2 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-03-24 10:36:45 EDT
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Description Adam Mariš 2015-11-23 10:43:59 EST
It was found that when XDMCP sercer is enabled and LightDM receives an XDMCP Request packet with no addresses, it will attempt to access a negative index into an array, causing denial of service.

CVE assignment:

http://seclists.org/oss-sec/2015/q4/352
Comment 1 Adam Mariš 2015-11-23 10:44:14 EST
Created lightdm tracking bugs for this issue:

Affects: fedora-all [bug 1284575]
Comment 2 Rex Dieter 2016-03-24 10:36:45 EDT
per linked fedora bug,

According to the CVE_2015-8316 text, "some versions of LightDM (1.14 and 1.16 series) are vulnerable".

Fedora (and EPEL) ship lightdm-1.10.x, so it would appear we are safe, closing.

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