62845 : KVM 83 x86 Emulator SMP Segment Register Selector Local Privilege Escalation
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Timeline

Disclosure Date
2010-03-01

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2010-0419" target="_blank">CVE</a>)</em> : The x86 emulator in KVM 83, when a guest is configured for Symmetric Multiprocessing (SMP), does not properly restrict writing of segment selectors to segment registers, which might allow guest OS users to cause a denial of service (guest OS crash) or gain privileges on the guest OS by leveraging access to a (1) IO port or (2) MMIO region, and replacing an instruction in between emulator entry and instruction fetch.

Classification

Location: Local Access Required
Attack Type: Denial of Service, Input Manipulation
Impact: Loss of Integrity, Loss of Availability
Solution: Patch / RCS
Disclosure: Vendor Verified

Products

Unknown or Incomplete

References

Security Tracker: 1023663
CVE ID: 2010-0419 (see also: NVD)
Bugtraq ID: 38467
Secunia Advisory ID: 38901 40012
Vendor Specific News/Changelog Entry: http://lists.debian.org/debian-security-announce/2010/msg00050.html
https://bugzilla.redhat.com/show_bug.cgi?id=563463
https://lists.ubuntu.com/archives/ubuntu-security-announce/2010-June/001099.html
RedHat RHSA: RHSA-2010:0126

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 4.4
Source: nvd.nist.gov | Generated: 2010-03-05 | Disagree?

Blogs

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