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Revision:  369565
Date:      2014-09-29
Time:      23:34:30Z
Committer: bdrewery

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VuXML IDDescription
2eebebff-cd3b-11e2-8f09-001b38c3836cxorg -- protocol handling issues in X Window System client libraries

freedesktop.org reports:

Ilja van Sprundel, a security researcher with IOActive, has discovered a large number of issues in the way various X client libraries handle the responses they receive from servers, and has worked with X.Org's security team to analyze, confirm, and fix these issues.

Most of these issues stem from the client libraries trusting the server to send correct protocol data, and not verifying that the values will not overflow or cause other damage. Most of the time X clients & servers are run by the same user, with the server more privileged from the clients, so this is not a problem, but there are scenarios in which a privileged client can be connected to an unprivileged server, for instance, connecting a setuid X client (such as a screen lock program) to a virtual X server (such as Xvfb or Xephyr) which the user has modified to return invalid data, potentially allowing the user to escalate their privileges.

The vulnerabilities include:

Integer overflows calculating memory needs for replies.

Sign extension issues calculating memory needs for replies.

Buffer overflows due to not validating length or offset values in replies.

Integer overflows parsing user-specified files.

Unbounded recursion parsing user-specified files.

Memory corruption due to unchecked return values.


Discovery 2013-05-23
Entry 2013-06-04
libX11
lt 1.6.0

libXext
lt 1.3.2

libXfixes
lt 5.0.1

libXi
lt 1.7_1

libXinerama
lt 1.1.3

libXp
lt 1.0.2

libXrandr
lt 1.4.1

libXrender
lt 0.9.7_1

libXres
lt 1.0.7

libXtst
lt 1.2.2

libXv
lt 1.0.8

libXvMC
lt 1.0.7_1

libXxf86dga
lt 1.1.4

libdmx
lt 1.1.3

libxcb
lt 1.9.1

libGL
lt 7.6.1_4

gt 7.8.0 lt 8.0.5_4

xf86-video-openchrome
lt 0.3.3

libFS
lt 1.0.5

libXxf86vm
lt 1.1.3

libXt
lt 1.1.4

libXcursor
lt 1.1.14

CVE-2013-1981
CVE-2013-1982
CVE-2013-1983
CVE-2013-1984
CVE-2013-1985
CVE-2013-1986
CVE-2013-1987
CVE-2013-1988
CVE-2013-1989
CVE-2013-1990
CVE-2013-1991
CVE-2013-1992
CVE-2013-1993
CVE-2013-1994
CVE-2013-1995
CVE-2013-1996
CVE-2013-1997
CVE-2013-1998
CVE-2013-1999
CVE-2013-2000
CVE-2013-2001
CVE-2013-2002
CVE-2013-2003
CVE-2013-2004
CVE-2013-2005
CVE-2013-2062
CVE-2013-2063
CVE-2013-2064
CVE-2013-2066