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| Problem Description |
Ian Jackson found a security issue in the QEMU block device drivers
backend that could allow a guest operating system to issue a block
device request and read or write arbitrary memory locations, which
could then lead to privilege escalation (CVE-2008-0928).
It was found that Xen allowed unprivileged DomU domains to overwrite
xenstore values which should only be changeable by the privileged
Dom0 domain. An attacker able to control a DomU domain could possibly
use this flaw to kill arbitrary processes in Dom0 or trick a Dom0
user into accessing the text console of a different domain running
on the same host. This update makes certain parts of xenstore tree
read-only to unprivilged DomU domains (CVE-2008-4405).
A vulnerability in the qemu-dm.debug script was found in how it
created a temporary file in /tmp. A local attacker in Dom0 could
potentially use this flaw to overwrite arbitrary files via a symlink
attack (CVE-2008-4993). Since this script is not used in production,
it has been removed from this update package.
The updated packages have been patched to prevent these issues.
| Updated Packages |
Corporate Server 4.0
3785ed3cf9eaf4abb8842713706daeb3 corporate/4.0/i586/xen-3.0.1-3.2.20060mlcs4.i586.rpm 22f6a2eced04422519cbf734df73d453 corporate/4.0/SRPMS/xen-3.0.1-3.2.20060mlcs4.src.rpm
Corporate Server 4.0/X86_64
450884c01338338d57834dd0b4947805 corporate/4.0/x86_64/xen-3.0.1-3.2.20060mlcs4.x86_64.rpm 22f6a2eced04422519cbf734df73d453 corporate/4.0/SRPMS/xen-3.0.1-3.2.20060mlcs4.src.rpm
| References |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4993
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4405
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0928
| Upgrade |
To upgrade automatically, use MandrivaUpdate.
| Verification |
Please verify the update prior to upgrading to ensure the integrity of the downloaded package. You can do this with the command :
rpm --checksig package.rpm
You can get the GPG public key of the Mandriva Security Team to verify the GPG signature of each RPM.
If you use MandrivaUpdate, the verification of md5 checksum and GPG signature is performed automatically for you.