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.
libextractor 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 0.4.2-2sarge6.
The stable distribution (etch) isn't affected by this problem.
The unstable distribution (sid) isn't affected by this problem.
We recommend that you upgrade your libextractor packages.