Vulnerable Systems:
* Apple Safari version 5.0.4 and prior for Windows
* Apple Safari version 5.0.4 and prior for Mac OS X
* Apple iOS versions 3.0 through 4.3.1 for iPhone 3GS and later
* Apple iOS versions 3.1 through 4.3.1 for iPod touch (3rd generation) and later
* Apple iOS versions 3.2 through 4.3.1 for iPad
* Apple iOS versions 4.2.5 through 4.2.6 for iPhone 4 (CDMA)
Immune Systems:
* Apple Safari version 5.0.5 for Windows
* Apple Safari version 5.0.5 for Mac OS X.
* Apple iOS version 4.3.2 for iPhone
* Apple iOS version 4.3.2 for iPod
* Apple iOS version 4.3.2 for iPad.
* Apple iOS version 4.2.7 for iPhone 4 (CDMA).
The vulnerability is caused by a use-after-free error in the WebKit library when processing certain text nodes, which could be exploited by remote attackers to execute arbitrary code by tricking a user into visiting a specially crafted web page.