CVE 2008-1072
The TFTP dissector in Wireshark (formerly Ethereal) 0.6.0 through 0.99.7, when running on Ubuntu 7.10, allows remote attackers to cause a denial of service (crash or memory consumption) via a malformed packet, possibly related to a Cairo library bug.
See the 
CVE page on Mitre.org
for more details.
