National Cyber Awareness System
Vulnerability Summary for CVE-2012-0045
Original release date:07/03/2012
Last revised:07/03/2012
Source:
US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
Exploitability Subscore:
3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: https://github.com/torvalds/linux/commit/c2226fc9e87ba3da060e47333657cd6616652b84
Type: Patch Information; Exploit
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=773370
External Source: MLIST
Name: [oss-security] 20120111 Re: CVE request -- kernel: kvm: syscall instruction induced guest panic
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.14
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c2226fc9e87ba3da060e47333657cd6616652b84
