HTTP: FreeType PostScript Type1 Font Parsing Code Execution
This signature detects attempts to exploit a known vulnerability in the FreeType font engine. The vulnerability is due to improper validation of the argument count parameter passed to the PostScript operation callothersubr, which can lead to a stack buffer overflow. A remote attacker can entice a target user to download a malicious PostScript or PDF file, and leverage this vulnerability to execute arbitrary code.
Extended Description
FreeType is prone to a memory-corruption vulnerability because it fails to properly validate user-supplied data. Attackers can leverage this issue to execute arbitrary code in the context of the application using the vulnerable library. Failed attacks will cause denial-of-service conditions. FreeType 2.4.5 is vulnerable; other versions may also be affected. Note (July 8, 2011): This BID was previously titled 'Apple iOS for iPhone/iPad/iPod touch Privilege Escalation Vulnerability' but has been rewritten to better reflect the underlying vulnerability.
Affected Products
Apple iphone,Apple mac_os_x_server
Short Name
HTTP:STC:DL:FREETYPE-TYPE1
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
CVE-2011-0226 Code Execution Font FreeType Parsing PostScript Type1 bid:48619
Release Date
09/01/2011
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3339
False Positive
Unknown
Vendors
Red_hat
Freetype
Suse
Apple
Gentoo
Avaya
Ubuntu
Mandriva
Debian
CVSS Score
9.3