Stack-based buffer overflow in hpc.c in dvips in teTeX and TeXlive 2007 and earlier allows user-assisted attackers to execute arbitrary code via a DVI file with a long href tag.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.