Actu
Vigil@nce: libwmf, memory corruption
May 2009 by Vigil@nce
An attacker can invite the victim to open a malicious WMF image
with an application linked to libwmf in order to create a denial
of service or to execute code on his computer.
– Severity: 2/4
– Consequences: user access/rights, denial of service of client
– Provenance: document
– Means of attack: no proof of concept, no attack
– Ability of attacker: expert (4/4)
– Confidence: confirmed by the editor (5/5)
– Diffusion of the vulnerable configuration: high (3/3)
– Creation date: 06/05/2009
IMPACTED PRODUCTS
– Debian Linux
– Mandriva Corporate
– Mandriva Linux
– Red Hat Enterprise Linux
– Unix - plateform
DESCRIPTION OF THE VULNERABILITY
The libwmf library handles WMF (Microsoft Windows Metafile Format)
images.
This library contains its own version of the gd library. However,
the gdClipSetAdd() function of the src/extra/gd/gd_clip.c file
reallocates a pointer which can be uninitialized. A memory
corruption thus occurs.
An attacker can therefore invite the victim to open a malicious
WMF image with an application linked to libwmf in order to create
a denial of service or to execute code on his computer.
CHARACTERISTICS
– Identifiers: 496864, BID-34792, CVE-2009-1364, DSA 1796-1,
MDVSA-2009:106, RHSA-2009:0457-01, VIGILANCE-VUL-8692
– Url: http://vigilance.fr/vulnerability/libwmf-memory-corruption-8692
