#VU43920 Input validation error in Linux kernel - CVE-2012-0045
Published: July 3, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43920
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2012-0045
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
Remediation
Install update from vendor's website.
External links
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c2226fc9e87ba3da060e47333657cd6616652b84
- 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/2012/01/12/2
- https://bugzilla.redhat.com/show_bug.cgi?id=773370
- https://github.com/torvalds/linux/commit/c2226fc9e87ba3da060e47333657cd6616652b84