Actu
Vigil@nce - Linux kernel: memory corruption via GFS2
May 2010 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/
SYNTHESIS OF THE VULNERABILITY
A local attacker can manipulate files on a GFS2 filesystem, in
order to create a denial of service and possibly to execute code.
Severity: 2/4
Creation date: 27/04/2010
DESCRIPTION OF THE VULNERABILITY
The Linux kernel supports GFS (Global File System).
When quotas are enabled, the kernel uses the gfs2_quota structure
to store information on files. This structure can be distributed
on two memory pages. However, data are not correctly located on
the second page, which corrupts the memory.
A local attacker can therefore manipulate files on a GFS2
filesystem, in order to create a denial of service and possibly to
execute code.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/Linux-kernel-memory-corruption-via-GFS2-9615
