CVE 2008-2327
Multiple buffer underflows in the (1) LZWDecode, (2) LZWDecodeCompat, and (3) LZWDecodeVector functions in tif_lzw.c in the LZW decoder in LibTIFF 3.8.2 and earlier allow context-dependent attackers to execute arbitrary code via a crafted TIFF file, related to improper handling of the CODE_CLEAR code.
See the 
CVE page on Mitre.org
for more details.
