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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.
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
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
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gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98
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Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com>
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