Gentoo: GLSA-200710-16: X.Org X server: Composite local privilege escalation
Summary
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Gentoo Linux Security Advisory GLSA 200710-16 https://security.gentoo.org/
Severity: High Title: X.Org X server: Composite local privilege escalation Date: October 14, 2007 Bugs: #191964 ID: 200710-16
Synopsis ======= A vulnerability has been discovered in the Composite extension of the X.Org X server, allowing for a local privilege escalation.
Background ========= The X Window System is a graphical windowing system based on a client/server model.
Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-base/xorg-server < 1.3.0.0-r1 >= 1.3.0.0-r1
========== Aaron Plattner discovered a buffer overflow in the compNewPixmap() function when copying data from a large pixel depth pixmap into a smaller pixel depth pixmap.
Impact ===== A local attacker could execute arbitrary code with the privileges of the user running the X server, typically root.
Workaround ========= Disable the Composite extension by setting ' Option "Composite" "disable" ' in the Extensions section of xorg.conf.
Note: This could affect the functionality of some applications.
Resolution ========= All X.Org X server users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r1"
References ========= [ 1 ] CVE-2007-4730 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4730
Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/200710-16
Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org/.
License ====== Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Mozilla - iD8DBQFHEppiuhJ+ozIKI5gRAmOeAJ46xK+4nH8LWGxbNmnlmPrltBqsHgCfUTNK 8qUzM6SvnXk2c2yZgp50GTk=DiOR -----END PGP SIGNATURE-----
Resolution
References
Availability
Concerns
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