Test ID:	1.3.6.1.4.1.25623.1.0.881709
Category:	CentOS Local Security Checks
Title:	CentOS Update for kmod-kvm CESA-2013:0727 centos5
Summary:	The remote host is missing an update for the 'kmod-kvm'; package(s) announced via the referenced advisory.
Description:	Summary: The remote host is missing an update for the 'kmod-kvm' package(s) announced via the referenced advisory. Vulnerability Insight: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A flaw was found in the way KVM handled guest time updates when the buffer the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) crossed a page boundary. A privileged guest user could use this flaw to crash the host or, potentially, escalate their privileges, allowing them to execute arbitrary code at the host kernel level. (CVE-2013-1796) A potential use-after-free flaw was found in the way KVM handled guest time updates when the GPA (guest physical address) the guest registered by writing to the MSR_KVM_SYSTEM_TIME machine state register (MSR) fell into a movable or removable memory region of the hosting user-space process (by default, QEMU-KVM) on the host. If that memory region is deregistered from KVM using KVM_SET_USER_MEMORY_REGION and the allocated virtual memory reused, a privileged guest user could potentially use this flaw to escalate their privileges on the host. (CVE-2013-1797) A flaw was found in the way KVM emulated IOAPIC (I/O Advanced Programmable Interrupt Controller). A missing validation check in the ioapic_read_indirect() function could allow a privileged guest user to crash the host, or read a substantial portion of host kernel memory. (CVE-2013-1798) Red Hat would like to thank Andrew Honig of Google for reporting all of these issues. All users of kvm are advised to upgrade to these updated packages, which contain backported patches to correct these issues. Note that the procedure in the Solution section must be performed before this update will take effect. Affected Software/OS: kmod-kvm on CentOS 5 Solution: Please install the updated packages. CVSS Score: 6.8 CVSS Vector: AV:A/AC:H/Au:N/C:C/I:C/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2013-1796 58607 http://www.securityfocus.com/bid/58607 MDVSA-2013:176 http://www.mandriva.com/security/advisories?name=MDVSA-2013:176 RHSA-2013:0727 http://rhn.redhat.com/errata/RHSA-2013-0727.html RHSA-2013:0744 http://rhn.redhat.com/errata/RHSA-2013-0744.html RHSA-2013:0746 http://rhn.redhat.com/errata/RHSA-2013-0746.html RHSA-2013:0928 http://rhn.redhat.com/errata/RHSA-2013-0928.html RHSA-2013:1026 http://rhn.redhat.com/errata/RHSA-2013-1026.html USN-1805-1 http://www.ubuntu.com/usn/USN-1805-1 USN-1808-1 http://www.ubuntu.com/usn/USN-1808-1 USN-1809-1 http://www.ubuntu.com/usn/USN-1809-1 USN-1812-1 http://www.ubuntu.com/usn/USN-1812-1 USN-1813-1 http://www.ubuntu.com/usn/USN-1813-1 [oss-security] 20130320 linux kernel: kvm: CVE-2013-179[6..8] http://www.openwall.com/lists/oss-security/2013/03/20/9 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c300aa64ddf57d9c5d9c898a64b36877345dd4a9 https://bugzilla.redhat.com/show_bug.cgi?id=917012 https://github.com/torvalds/linux/commit/c300aa64ddf57d9c5d9c898a64b36877345dd4a9 openSUSE-SU-2013:0847 http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00018.html openSUSE-SU-2013:0925 http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html openSUSE-SU-2013:1187 http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html Common Vulnerability Exposure (CVE) ID: CVE-2013-1797 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0b79459b482e85cb7426aa7da683a9f2c97aeae1 https://bugzilla.redhat.com/show_bug.cgi?id=917013 https://github.com/torvalds/linux/commit/0b79459b482e85cb7426aa7da683a9f2c97aeae1 Common Vulnerability Exposure (CVE) ID: CVE-2013-1798 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a2c118bfab8bc6b8bb213abfc35201e441693d55 http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html https://bugzilla.redhat.com/show_bug.cgi?id=917017 https://github.com/torvalds/linux/commit/a2c118bfab8bc6b8bb213abfc35201e441693d55
Copyright	Copyright (C) 2013 Greenbone AG

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