A local overflow exists in libpng. The library function png_handle_sBIT relies on checks in other functions to perform input validation resulting in a possible buffer overflow. With a specially crafted PNG file, an attacker might cause execution of code resulting in a loss of integrity.
Classification
Location:
Local Access Required
Attack Type:
Input Manipulation
Impact:
Loss of Integrity
Exploit:
Exploit Unknown
Disclosure:
OSVDB Verified
Technical
According to the vulnerability discoverer, this issue is extremely difficult to exploit, if at all.
Solution
Upgrade to version 1.2.6 release candidate 1 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds. Users of the older 1.0 series should upgrade to libpng-1.0.16 release candidate 1 or higher.
scary.beasts.org -