Test ID:	1.3.6.1.4.1.25623.1.0.69803
Category:	Red Hat Local Security Checks
Title:	RedHat Security Advisory RHSA-2011:0919
Summary:	NOSUMMARY
Description:	Description: The remote host is missing updates announced in advisory RHSA-2011:0919. KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM. It was found that the virtio subsystem in qemu-kvm did not properly validate virtqueue in and out requests from the guest. A privileged guest user could use this flaw to trigger a buffer overflow, allowing them to crash the guest (denial of service) or, possibly, escalate their privileges on the host. (CVE-2011-2212) It was found that the virtio_queue_notify() function in qemu-kvm did not perform sufficient input validation on the value later used as an index into the array of virtqueues. An unprivileged guest user could use this flaw to crash the guest (denial of service) or, possibly, escalate their privileges on the host. (CVE-2011-2512) Red Hat would like to thank Nelson Elhage for reporting CVE-2011-2212. This update also fixes the following bug: * A bug was found in the way vhost (in qemu-kvm) set up mappings with the host kernel's vhost module. This could result in the host kernel's vhost module not having a complete view of a guest system's memory, if that guest had more than 4 GB of memory. Consequently, hot plugging a vhost-net network device and restarting the guest may have resulted in that device no longer working. (BZ#701771) All users of qemu-kvm should upgrade to these updated packages, which contain backported patches to resolve these issues. After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. Solution: Please note that this update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date http://rhn.redhat.com/errata/RHSA-2011-0919.html Risk factor : High
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2011-2212 Debian Security Information: DSA-2282 (Google Search) https://www.debian.org/security/2011/dsa-2282 http://www.osvdb.org/74751 RedHat Security Advisories: RHSA-2011:0919 http://rhn.redhat.com/errata/RHSA-2011-0919.html http://secunia.com/advisories/45158 http://secunia.com/advisories/45170 http://secunia.com/advisories/45187 http://secunia.com/advisories/45188 http://secunia.com/advisories/45301 http://secunia.com/advisories/45354 SuSE Security Announcement: SUSE-SU-2011:0806 (Google Search) https://hermes.opensuse.org/messages/9605323 SuSE Security Announcement: openSUSE-SU-2011:0803 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html http://ubuntu.com/usn/usn-1165-1 Common Vulnerability Exposure (CVE) ID: CVE-2011-2512 Debian Security Information: DSA-2270 (Google Search) https://www.debian.org/security/2011/dsa-2270 http://www.openwall.com/lists/oss-security/2011/06/28/13 http://www.openwall.com/lists/oss-security/2011/06/29/15 http://secunia.com/advisories/44458 http://secunia.com/advisories/44648
Copyright	Copyright (c) 2011 E-Soft Inc. http://www.securityspace.com

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