National Cyber-Alert System
Vulnerability Summary for CVE-2009-1242
Original release date:04/06/2009
Last revised:06/23/2009
Source:
US-CERT/NIST
Overview
The vmx_set_msr function in arch/x86/kvm/vmx.c in the VMX implementation in the KVM subsystem in the Linux kernel before 2.6.29.1 on the i386 platform allows guest OS users to cause a denial of service (OOPS) by setting the EFER_LME (aka "Long mode enable") bit in the Extended Feature Enable Register (EFER) model-specific register, which is specific to the x86_64 platform.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
- Official Statement from Red Hat (04/07/2009)
-
Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, 5 or Red Hat Enterprise MRG.
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: http://patchwork.kernel.org/patch/15549/
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2009-5356
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=502109
External Source: XF
Name: linux-kernel-eferlme-dos(49594)
External Source: VUPEN
Name: ADV-2009-0924
External Source: BID
Name: 34331
External Source: BUGTRAQ
Name: 20090516 rPSA-2009-0084-1 kernel
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.29-git1.log
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1
External Source: MISC
Name: http://www.globalsecuritymag.com/Vigil-nce-Linux-kernel-denial-of,20090402,8311
External Source: DEBIAN
Name: DSA-1800
External Source: DEBIAN
Name: DSA-1787
External Source: CONFIRM
Name: http://wiki.rpath.com/Advisories:rPSA-2009-0084
External Source: MISC
Name: http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-EFER-8585
External Source: SECUNIA
Name: 35394
External Source: SECUNIA
Name: 35387
External Source: SECUNIA
Name: 35226
External Source: SECUNIA
Name: 35121
External Source: SECUNIA
Name: 35120
External Source: SECUNIA
Name: 34981
External Source: SECUNIA
Name: 34478
Type: Advisory
External Source: MLIST
Name: [oss-security] 20090401 CVE request: kernel: KVM: VMX: Dont allow uninhibited access to EFER on i386
External Source: SUSE
Name: SUSE-SA:2009:032
External Source: SUSE
Name: SUSE-SA:2009:031
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=16175a796d061833aacfbd9672235f2d2725df65