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[ GLSA 200702-12 ] CHMlib: User-assisted remote execution of arbitrary code
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GLSA
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PostPosted: Tue Feb 27, 2007 4:26 pm    Post subject: [ GLSA 200702-12 ] CHMlib: User-assisted remote execution of Reply with quote

Gentoo Linux Security Advisory

Title: CHMlib: User-assisted remote execution of arbitrary code (GLSA 200702-12)
Severity: normal
Exploitable: remote
Date: February 27, 2007
Updated: May 20, 2008
Bug(s): #163989
ID: 200702-12

Synopsis

A memory corruption vulnerability in CHMlib could lead to the remote execution of arbitrary code.

Background

CHMlib is a library for the MS CHM (Compressed HTML) file format plus extracting and HTTP server utils.

Affected Packages

Package: dev-libs/chmlib
Vulnerable: < 0.39
Unaffected: >= 0.39
Architectures: All supported architectures


Description

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 locations.

Impact

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.

Workaround

There is no known workaround at this time.

Resolution

All CHMlib users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/chmlib-0.39"


References

Original Advisory
CVE-2007-0619


Last edited by GLSA on Wed May 21, 2008 4:18 am; edited 1 time in total
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