CVE-2012-0218

Impact:
Moderate
Public Date:
2012-06-12
Bugzilla:
813908: CVE-2012-0218 kernel: xen: guest denial of service on syscall/sysenter exception generation

The MITRE CVE dictionary describes this issue as:

Xen 3.4, 4.0, and 4.1, when the guest OS has not registered a handler for a syscall or sysenter instruction, does not properly clear a flag for exception injection when injecting a General Protection Fault, which allows local PV guest OS users to cause a denial of service (guest crash) by later triggering an exception that would normally be handled within Xen.

Find out more about CVE-2012-0218 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5 as we did not have support for sysenter and compat (32bit) version of syscall instructions for PV guests running on the Xen hypervisor (introduced in upstream changeset 16207:aeebd173c3fa).

This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4
Base Metrics AV:L/AC:H/Au:N/C:N/I:N/A:C
Access Vector Local
Access Complexity High
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel-xen Will not fix
Red Hat Enterprise Linux 5 kernel Not affected

Acknowledgements

Red Hat would like to thank the Xen for reporting this issue.

Last Modified

CVE description copyright © 2017, The MITRE Corporation

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