Chris Evans discovered several stack and integer overflows in the
libXpm library which is provided by X.Org, XFree86 and LessTif.
For the stable distribution (woody) this problem has been fixed in
version 4.1.0-16woody4.
For the unstable distribution (sid) this problem has been fixed in
version 4.3.0.dfsg.1-8.
We recommend that you upgrade your libxpm packages.