National Cyber-Alert System
Vulnerability Summary for CVE-2009-2287
Original release date:07/01/2009
Last revised:08/04/2009
Source:
US-CERT/NIST
Overview
The kvm_arch_vcpu_ioctl_set_sregs function in the KVM in Linux kernel 2.6 before 2.6.30, when running on x86 systems, does not validate the page table root in a KVM_SET_SREGS call, which allows local users to cause a denial of service (crash or hang) via a crafted cr3 value, which triggers a NULL pointer dereference in the gfn_to_rmap function.
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 (07/01/2009)
-
Not vulnerable. This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, and 5, and Red Hat Enterprise MRG.
References to Advisories, Solutions, and Tools
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External Source: MLIST
Name: [oss-security] 20090630 CVE Request: kernel: kvm: failure to validate cr3 after KVM_SET_SREGS
Type: Patch Information
External Source: UBUNTU
Name: USN-807-1
External Source: DEBIAN
Name: DSA-1845
External Source: CONFIRM
Name: http://sourceforge.net/tracker/?func=detail&atid=893831&aid=2687641&group_id=180599
External Source: SECUNIA
Name: 36054
External Source: SECUNIA
Name: 36045
External Source: SECUNIA
Name: 35675
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=59839dfff5eabca01cc4e20b45797a60a80af8cb
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob;f=queue-2.6.30/kvm-x86-check-for-cr3-validity-in-ioctl_set_sregs.patch;h=b48a47dad2cf76358b327368f80c0805e6370c68;hb=e7c45b24f298b5d9efd7d401150f64a1b51aaac4
