The swap_char2b function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values that specify an arbitrary number of bytes to be swapped on the heap, which triggers heap corruption.
https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00352.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11599
https://issues.rpath.com/browse/RPL-1756
https://exchange.xforce.ibmcloud.com/vulnerabilities/36920
http://www.vupen.com/english/advisories/2008/0924/references
http://www.vupen.com/english/advisories/2008/0149
http://www.vupen.com/english/advisories/2007/3467
http://www.vupen.com/english/advisories/2007/3338
http://www.vupen.com/english/advisories/2007/3337
http://www.securitytracker.com/id?1018763
http://www.securityfocus.com/bid/25898
http://www.securityfocus.com/archive/1/481432/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2008-0030.html
http://www.redhat.com/support/errata/RHSA-2008-0029.html
http://www.novell.com/linux/security/advisories/2007_54_xorg.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:210
http://sunsolve.sun.com/search/document.do?assetkey=1-66-200642-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-103114-1
http://security.gentoo.org/glsa/glsa-200710-11.xml
http://secunia.com/advisories/29420
http://secunia.com/advisories/28542
http://secunia.com/advisories/28536
http://secunia.com/advisories/28514
http://secunia.com/advisories/28004
http://secunia.com/advisories/27560
http://secunia.com/advisories/27240
http://secunia.com/advisories/27228
http://secunia.com/advisories/27176
http://secunia.com/advisories/27060
http://secunia.com/advisories/27052
http://secunia.com/advisories/27040
http://lists.freedesktop.org/archives/xorg-announce/2007-October/000416.html
http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=602
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01323725
http://docs.info.apple.com/article.html?artnum=307562