Integer overflow in the JBIG2 decoder in Xpdf 3.02pl2 and earlier, as used in Poppler and other products, when running on Mac OS X, has unspecified impact, related to "gallocn."

Heap-based buffer overflow in Xpdf 3.02pl2 and earlier, CUPS 1.3.9, and probably other products, allows remote attackers to execute arbitrary code via a PDF file with crafted JBIG2 symbol dictionary segments.

An array indexing error was found in the way xpdf / poppler parsed Type1 fonts embedded in PDF documents. In FoFiType1::parse(), text representation of the numeric code value was converted to integer value using atoi(). This value was checked to ensure it's less than 256, but there was no check to ensure it's not negative (string passed to atoi() was checked to only contain characters '0'-'9' before the call though). On platforms, where atoi() could return negative result when parsing large positive values (exceeding INTMAX), this could could lead to write out of array bounds due to use of negative index.

poppler upstream commit: http://cgit.freedesktop.org/poppler/poppler/commit/?id=39d140bfc0b8239bdd96d6a55842034ae5c05473

Reference: http://secunia.com/advisories/41596/