Gentoo: GLSA-200710-11: X Font Server: Multiple Vulnerabilities
Summary
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Gentoo Linux Security Advisory GLSA 200710-11 https://security.gentoo.org/
Severity: High Title: X Font Server: Multiple Vulnerabilities Date: October 12, 2007 Bugs: #185660, #194606 ID: 200710-11
Synopsis ======= Three vulnerabilities have been discovered in the X Font Server possibly allowing local attackers to gain elevated privileges.
Background ========= The X.Org X11 X Font Server provides a standard mechanism for an X server to communicate with a font renderer.
Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 x11-apps/xfs < 1.0.5 >= 1.0.5
========== iDefense reported that the xfs init script does not correctly handle a race condition when setting permissions of a temporary file (CVE-2007-3103). Sean Larsson discovered an integer overflow vulnerability in the build_range() function possibly leading to a heap-based buffer overflow when handling "QueryXBitmaps" and "QueryXExtents" protocol requests (CVE-2007-4568). Sean Larsson also discovered an error in the swap_char2b() function possibly leading to a heap corruption when handling the same protocol requests (CVE-2007-4990).
Impact ===== The first issue would allow a local attacker to change permissions of arbitrary files to be world-writable by performing a symlink attack. The second and third issues would allow a local attacker to execute arbitrary code with privileges of the user running the X Font Server, usually xfs.
Workaround ========= There is no known workaround at this time.
Resolution ========= All X Font Server users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=x11-apps/xfs-1.0.5"
References ========= [ 1 ] CVE-2007-3103 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3103 [ 2 ] CVE-2007-4568 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4568 [ 3 ] CVE-2007-4990 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4990
Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/200710-11
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 - iD8DBQFHD+eHuhJ+ozIKI5gRAlcdAJ4t+dNJKPDJFQEte8XCtLiIcjzu1QCfdoaF uFfqllq2K1mtyPSCW+jz6DU=iwzz -----END PGP SIGNATURE-----
Resolution
References
Availability
Concerns
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