Multiple security vulnerabilities in Apple iOS

Release date: 2011-11-11
Updated on: 2011-11-14

Affected Systems:
Apple iOS iPod touch 5.x
Apple iOS 5.x for iPhone 3GS
Description:
--------------------------------------------------------------------------------
Cve id: CVE-2011-3246, CVE-2011-3439, CVE-2011-3441, CVE-2011-3442

Apple iOS is the latest operating system running on Apple's iPhone and iPod touch devices.

Multiple vulnerabilities exist in the implementation of Apple iOS, which can be exploited by malicious users to leak sensitive information, perform spoofing attacks, and control user devices.

1) when processing URLs, CFNetwork errors can be redirected to the wrong server.

2) when processing FreeType fonts, multiple errors in the CoreGraphics component can be exploited to corrupt the memory.

3) When a valid flag combination is checked, the logic error in the mmap system can be used to bypass the code signature check and execute the unsigned code.

4) during DNS name search, libinfo errors can be found by spoofing.

<* Source: Erling Ellingsen

Link: http://support.apple.com/kb/HT5052
*>

Suggestion:
--------------------------------------------------------------------------------
Vendor patch:

Apple
-----
The vendor has released a patch to fix this security problem. Please download it from the vendor's homepage:

Http://support.apple.com/