- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: LibXfont, TightVNC: Multiple vulnerabilities Date: May 08, 2007 Bugs: #172575, #174200 ID: 200705-10 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been reported in libXfont and TightVNC, allowing for the execution of arbitrary code with root privileges. Background ========== LibXfont is the X.Org font library. TightVNC is a VNC client/server for X displays. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/tightvnc < 1.2.9-r4 >= 1.2.9-r4 2 x11-libs/libXfont < 1.2.7-r1 >= 1.2.7-r1 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description =========== The libXfont code is prone to several integer overflows, in functions ProcXCMiscGetXIDList(), bdfReadCharacters() and FontFileInitTable(). TightVNC contains a local copy of this code and is also affected. Impact ====== A local attacker could use a specially crafted BDF Font to gain root privileges on the vulnerable host. Workaround ========== There is no known workaround at this time. Resolution ========== All libXfont users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.7-r1" All TightVNC users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tightvnc-1.2.9-r4" References ========== [ 1 ] CVE-2007-1003 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1003 [ 2 ] CVE-2007-1351 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1351 [ 3 ] CVE-2007-1352 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1352 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200705-10.xml 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 http://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. http://creativecommons.org/licenses/by-sa/2.5