It was discovered that an integer overflow in the xpdf PDF viewer may lead
to the execution of arbitrary code if a malformed PDF file is opened.
kpdf includes a copy of the xpdf code and required an update as well.
For the oldstable distribution (sarge) this problem has been fixed in
version 3.3.2-2sarge5.
For the stable distribution (etch) this problem has been fixed in
version 3.5.5-3etch1.
For the unstable distribution (sid) this problem has been fixed in
version 3.5.7-3.
We recommend that you upgrade your kpdf packages.