GLSA-200612-05 : KOffice shared libraries: Heap corruption
Medium Nessus Plugin ID 23857
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200612-05 (KOffice shared libraries: Heap corruption)
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.
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.
There is no known workaround at this time.
SolutionAll koffice-libs users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-office/koffice-libs-1.5.0'