CHMlib: User-assisted remote execution of arbitrary code
Gentoo Linux Security Advisory
||GLSA 200702-12 / CHMlib
||February 27, 2007
||May 20, 2008: 02
All supported architectures
A memory corruption vulnerability in CHMlib could lead to the remote
execution of arbitrary code.
CHMlib is a library for the MS CHM (Compressed HTML) file format plus
extracting and HTTP server utils.
When certain CHM files that contain tables and objects stored in pages
are parsed by CHMlib, an unsanitized value is passed to the alloca()
function resulting in a shift of the stack pointer to arbitrary memory
An attacker could entice a user to open a specially crafted CHM file,
resulting in the execution of arbitrary code with the permissions of
the user viewing the file.
There is no known workaround at this time.
All CHMlib users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/chmlib-0.39"