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Multiple vulnerabilities have been reported in libXfont and TightVNC, allowing for the execution of arbitrary code with root privileges.
LibXfont is the X.Org font library. TightVNC is a VNC client/server for X displays.
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.
A local attacker could use a specially crafted BDF Font to gain root privileges on the vulnerable host.
There is no known workaround at this time.
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"
[ 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
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
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 firstname.lastname@example.org or alternatively, you may file a bug at http://bugs.gentoo.org.
Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
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