QEMU drive_init function security bypass
| qemu-driveinit-security-bypass (42268) |  Medium Risk |
Description:
QEMU could allow a local attacker to bypass security restrictions caused by an error in the drive_init function. By writing a header to a raw formatted disk image that specifies another image format, an attacker on a guest instance could exploit this vulnerability to read arbitrary files on the host.
Platforms Affected:
- Fabrice Bellard, QEMU 0.9.1
- RedHat, Enterprise Linux 5
- RedHat, Enterprise Linux 5 Client
- RedHat, RHEL Desktop Multi OS 5 Client
- RedHat, RHEL Virtualization 5 Server
Remedy:
Refer to the QEMU SVN repository for patch, upgrade or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- qemu Change Log, Release 4277, Mon Apr 28 20:26:45 2008 UTC, Savannah CVS Surfing at http://svn.savannah.gnu.org/viewvc/?view=rev&root=qemu&revision=4277.
- QEMU SVN repository, [qemu] Revision 4277 at http://svn.savannah.gnu.org/viewvc/?view=rev&root=qemu&revision=4277.
- QEMU Web site, QEMU at http://fabrice.bellard.free.fr/qemu/.
- Qemu-devel Mailing List, Mon, 28 Apr 2008 20:26:45 +0000, [4277] add format= to drive options (CVE-2008-2004) at http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00675.html.
- BID-29101: QEMU 'vl.c' Security Bypass Vulnerability
- CVE-2008-2004: The drive_init function in QEMU 0.9.1 determines the format of a raw disk image based on the header, which allows local guest users to read arbitrary files on the host by modifying the header to identify a different format, which is used when the guest is restarted.
- RHSA-2008-0194: Important: xen security and bug fix update
- SA30111: QEMU "drive_init()" Disk Format Security Bypass
- SUSE-SR:2008:013: SUSE Security Summary Report
Reported:
Apr 28, 2008
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