WebKit in Apple Safari before 4.0, iPhone OS 1.0 through 2.2.1, and iPhone OS for iPod touch 1.1 through 2.2.1 does not properly handle constant (aka const) declarations in a type-conversion operation during JavaScript exception handling, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted HTML document.
lists.apple.com/archives/security-announce/2009/jun/msg00002.html
lists.apple.com/archives/security-announce/2009/Jun/msg00005.html
lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html
osvdb.org/54984
secunia.com/advisories/35379
secunia.com/advisories/43068
securitytracker.com/id?1022345
support.apple.com/kb/HT3613
support.apple.com/kb/HT3639
www.securityfocus.com/bid/35260
www.securityfocus.com/bid/35311
www.vupen.com/english/advisories/2009/1522
www.vupen.com/english/advisories/2009/1621
www.vupen.com/english/advisories/2011/0212