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Bug 286104 (CVE-2009-3290) - Kernel: KVM: x86: Disallow hypercalls for guest callers in rings > 0 (CVE-2009-3290)
Summary: Kernel: KVM: x86: Disallow hypercalls for guest callers in rings > 0 (CVE-200...
Status: RESOLVED FIXED
Alias: CVE-2009-3290
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL: http://git.kernel.org/?p=linux/kernel...
Whiteboard: [linux <2.6.31]
Keywords:
Depends on:
Blocks:
 
Reported: 2009-09-23 15:36 UTC by Alex Legler (RETIRED)
Modified: 2013-09-15 18:40 UTC (History)
2 users (show)

See Also:
Package list:
Runtime testing required: ---


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Description Alex Legler (RETIRED) archtester Gentoo Infrastructure gentoo-dev Security 2009-09-23 15:36:16 UTC
CVE-2009-3290 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3290):
  The kvm_emulate_hypercall function in arch/x86/kvm/x86.c in KVM in
  the Linux kernel 2.6.25-rc1, and other versions before 2.6.31, when
  running on x86 systems, does not prevent access to MMU hypercalls
  from ring 0, which allows local guest OS users to cause a denial of
  service (guest kernel crash) and read guest kernel memory via
  unspecified "random addresses."