GLSA Advocate

Joined: 12 May 2004 Posts: 2663
|
Posted: Sun Dec 10, 2006 3:26 pm Post subject: [ GLSA 200612-05 ] KOffice shared libraries: Heap corruption |
|
|
Gentoo Linux Security Advisory
Title: KOffice shared libraries: Heap corruption (GLSA 200612-05)
Severity: normal
Exploitable: remote
Date: December 10, 2006
Bug(s): #155914
ID: 200612-05
Synopsis
An integer overflow in koffice-libs allows for a Denial of Service and possibly the execution of arbitrary code when viewing malicious PowerPoint files.
Background
KOffice is an integrated office suite for KDE. koffice-libs is a package containing shared librares used by KOffice programs.
Affected Packages
Package: app-office/koffice-libs
Vulnerable: < 1.5.0
Unaffected: >= 1.5.0
Architectures: All supported architectures
Description
Kees Cook of Ubuntu discovered that 'KLaola::readBigBlockDepot()' in klaola.cc fills 'num_of_bbd_blocks' while reading a .ppt (PowerPoint) file without proper sanitizing, resulting in an integer overflow subsequently overwriting the heap with parts of the file being read.
Impact
By enticing a user to open a specially crafted PowerPoint file, an attacker could crash the application and possibly execute arbitrary code with the rights of the user running KOffice.
Workaround
There is no known workaround at this time.
Resolution
All koffice-libs users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=app-office/koffice-libs-1.5.0" |
References
CVE-2006-6120 |
|