Red Hat Bugzilla – Bug 1311882
CVE-2014-9766 pixman: integer overflow in create_bits function
Last modified: 2016-11-08 11:23:06 EST
In create_bits() both height and stride are ints, so the result is
also an int, which will overflow if height or stride are big enough
and size_t is bigger than int.
Updated affects list for RHEL components.
Not affected because they already have the patch:
Not affected because the guard is _pixman_multiply_overflows_int which
matches the type of each operand and thus the result of the multiplication:
Removed from whiteboard because these packages don't appear to exist in
Ping Kurt - not sure if I'm treating rhev-m correctly or looking in the
right places to audit.
What info is needed?
Based on assertions from Mozilla that they believe their products only use the affected code in a safe context (with bounded width & height), and testing with firefox and thunderbird that has failed to disprove this assertion, I am marking Firefox, Thunderbird and Xulrunner as unaffected.
Testing has shown that the calls through Thebes only reach pixman with dimensions limited by display size. Since exploitation requires a buffer of around at least 33MP, this can be considered safe. Ditto for print to PDF/PS with any close to reasonable page size / DPI.