Bug 1381933 (CVE-2016-7953) - CVE-2016-7953 libXvMC: Insufficient validation of server responses results in buffer underflow
Summary: CVE-2016-7953 libXvMC: Insufficient validation of server responses results in...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-7953
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1381934
Blocks: 1381939
TreeView+ depends on / blocked
 
Reported: 2016-10-05 11:43 UTC by Andrej Nemec
Modified: 2023-03-24 13:43 UTC (History)
4 users (show)

Fixed In Version: libXvMC 1.0.10
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Environment:
Last Closed: 2019-06-08 02:59:43 UTC
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Description Andrej Nemec 2016-10-05 11:43:13 UTC 
It was found that when receiving a response from the server protocol data is not validated sufficiently. If an empty string is received from an x-server, the buffer might underrun by accessing "rep.nameLen - 1" unconditionally, which could end up being -1.

Upstream patch:

https://cgit.freedesktop.org/xorg/lib/libXvMC/commit/?id=2cd95e7da8367cccdcdd5c9b160012d1dec5cbdb

External References:

https://lists.x.org/archives/xorg-announce/2016-October/002720.html

CVE assignment:

http://seclists.org/oss-sec/2016/q4/17
Comment 1 Andrej Nemec 2016-10-05 11:46:59 UTC 
Created libXvMC tracking bugs for this issue:

Affects: fedora-all [bug 1381934]
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