Vulnerability Description
The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application, as demonstrated by an NASM file.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.2.13 |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.14
- http://www.openwall.com/lists/oss-security/2012/01/12/2Exploit
- https://bugzilla.redhat.com/show_bug.cgi?id=773370Exploit
- https://github.com/torvalds/linux/commit/c2226fc9e87ba3da060e47333657cd6616652b8ExploitPatch
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.14
- http://www.openwall.com/lists/oss-security/2012/01/12/2Exploit
- https://bugzilla.redhat.com/show_bug.cgi?id=773370Exploit
- https://github.com/torvalds/linux/commit/c2226fc9e87ba3da060e47333657cd6616652b8ExploitPatch
FAQ
What is CVE-2012-0045?
CVE-2012-0045 is a vulnerability with a CVSS score of 4.7 (MEDIUM). The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cau...
How severe is CVE-2012-0045?
CVE-2012-0045 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-0045?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.