CVE-2009-1242: Input Validation
First published: Mon Apr 06 2009(Updated: )
Description of problem: 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. Reference: <a href="http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=16175a796d061833aacfbd9672235f2d2725df65">http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=16175a796d061833aacfbd9672235f2d2725df65</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <2.6.29.1 | |
| openSUSE | =11.0 | |
| openSUSE | =11.1 | |
| Debian GNU/Linux | =4.0 | |
| Debian GNU/Linux | =5.0 | |
| Ubuntu Linux | =6.06 | |
| Ubuntu Linux | =8.04 | |
| Ubuntu Linux | =8.10 | |
| Ubuntu Linux | =9.04 | |
| Fedoraproject Fedora | =10 | |
| Linux kernel | <2.6.29.1 | |
| openSUSE libeconf | =11.0 | |
| openSUSE libeconf | =11.1 | |
| Debian | =4.0 | |
| Debian | =5.0 | |
| Fedora | =10 |
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Reference Links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=16175a796d061833aacfbd9672235f2d2725df65
- http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-1242
- http://article.gmane.org/gmane.comp.security.oss.general/1606
- http://admin.fedoraproject.org/updates/kernel-2.6.27.24-170.2.68.fc10
- https://bugzilla.redhat.com/show_bug.cgi?id=502109
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=16175a796d061833aacfbd9672235f2d2725df65
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00002.html
- http://openwall.com/lists/oss-security/2009/04/01/3
- http://patchwork.kernel.org/patch/15549/
- http://secunia.com/advisories/34478
- http://secunia.com/advisories/34981
- http://secunia.com/advisories/35120
- http://secunia.com/advisories/35121
- http://secunia.com/advisories/35226
- http://secunia.com/advisories/35387
- http://secunia.com/advisories/35394
- http://secunia.com/advisories/35656
- http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-EFER-8585
- http://wiki.rpath.com/Advisories:rPSA-2009-0084
- http://www.debian.org/security/2009/dsa-1787
- http://www.debian.org/security/2009/dsa-1800
- http://www.globalsecuritymag.com/Vigil-nce-Linux-kernel-denial-of%2C20090402%2C8311
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.29.1
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.29-git1.log
- http://www.securityfocus.com/archive/1/503610/100/0/threaded
- http://www.securityfocus.com/bid/34331
- http://www.ubuntu.com/usn/usn-793-1
- http://www.vupen.com/english/advisories/2009/0924
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49594
- https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01126.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=16175a796d061833aacfbd9672235f2d2725df65
- http://www.globalsecuritymag.com/Vigil-nce-Linux-kernel-denial-of,20090402,8311
Frequently Asked Questions
What is the severity of CVE-2009-1242?
CVE-2009-1242 is classified as a moderate severity vulnerability due to its potential for causing a denial of service.
How do I fix CVE-2009-1242?
To fix CVE-2009-1242, you should upgrade to a version of the Linux kernel greater than 2.6.29.1.
Which systems are affected by CVE-2009-1242?
CVE-2009-1242 affects various versions of the Linux kernel prior to 2.6.29.1, as well as specific versions of openSUSE, Debian, and Ubuntu.
What is the impact of CVE-2009-1242?
The impact of CVE-2009-1242 is that it allows guest OS users to cause a denial of service by setting the EFER_LME bit in the Extended Control Register.
Is there a patch available for CVE-2009-1242?
Yes, there are patches available that address CVE-2009-1242 as part of the kernel updates beyond version 2.6.29.1.
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