optipng -- arbitrary code execution via crafted BMP image

Secunia reports:

A vulnerability has been reported in OptiPNG, which potentially can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error in the BMP reader and can be exploited to cause a buffer overflow by tricking a user into processing a specially crafted file.

Successful exploitation may allow execution of arbitrary code.

[source]