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Last updated: 10/21/2014 1:07:53 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2012-2121

Original release date: 05/17/2012
Last revised: 01/13/2014
Source: US-CERT/NIST

Overview

The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 4.9 (MEDIUM) (AV:L/AC:L/Au:N/C:N/I:N/A:C) (legend)
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 service

References to Advisories, Solutions, and Tools

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External Source: REDHAT
Name: RHSA-2012:0743
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=814149
External Source: SECTRACK
Name: 1027083
External Source: UBUNTU
Name: USN-2036-1
External Source: UBUNTU
Name: USN-2037-1
External Source: UBUNTU
Name: USN-1577-1
External Source: SECUNIA
Name: 50732
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
External Source: MLIST
Name: [oss-security] 20120419 Re: CVE request -- kernel: kvm: device assignment page leak
External Source: CONFIRM
Name: https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195

Vulnerable software and versions

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Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)