An issue was discovered in Xpdf 4.01.01. There is an Integer overflow in the function JBIG2Bitmap::combine at JBIG2Stream.cc for the "one byte per line" case.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/TeamSeri0us/pocs/tree/master/xpdf/4.01.01 | third party advisory exploit |
| https://forum.xpdfreader.com/viewtopic.php?f=3&t=41851 | third party advisory exploit |