WebKit in Apple Safari before 5.0.3 on Mac OS X 10.5 through 10.6 and Windows, and before 4.1.3 on Mac OS X 10.4, does not properly handle the :first-letter pseudo-element in a Cascading Style Sheets (CSS) token sequence, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://secunia.com/advisories/43068 | third party advisory |
| http://support.apple.com/kb/HT4455 | patch vendor advisory |
| http://www.vupen.com/english/advisories/2011/0212 | vdb entry |
| http://www.vupen.com/english/advisories/2010/3046 | vdb entry |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12216 | signature vdb entry |
| http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00006.html | vendor advisory |
| http://lists.apple.com/archives/security-announce/2010//Nov/msg00002.html | vendor advisory |
| http://secunia.com/advisories/42314 | third party advisory |
| http://support.apple.com/kb/HT4456 | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/63360 | vdb entry |
| http://lists.apple.com/archives/security-announce/2010//Nov/msg00003.html | vendor advisory |