This service will be undergoing maintenance at 00:00 UTC, 2016-08-01. It is expected to last about 1 hours
Bug 953632 - (CVE-2013-1964) CVE-2013-1964 xen: grant table hypercall acquire/release imbalance
CVE-2013-1964 xen: grant table hypercall acquire/release imbalance
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
: ---
: ---
Assigned To: Red Hat Product Security
impact=important,public=20130418,repo...
: Security
Depends On: 953633
Blocks: 953634
  Show dependency treegraph
 
Reported: 2013-04-18 14:06 EDT by Petr Matousek
Modified: 2015-02-16 10:52 EST (History)
27 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Environment:
Last Closed: 2013-06-06 12:22:08 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:


Attachments (Terms of Use)

  None (edit)
Description Petr Matousek 2013-04-18 14:06:26 EDT
When releasing a non-v1 non-transitive grant after doing a grant copy operation, Xen incorrectly recurses (as if for a transitive grant) and releases an unrelated grant reference.

A malicious guest administrator can cause undefined behaviour; depending on the dom0 kernel a host crash is possible, but information leakage or privilege escalation cannot be ruled out.

References:

http://permalink.gmane.org/gmane.comp.security.oss.general/9978

Acknowledgements:

Red Hat would like to thank the Xen for reporting this issue.
Comment 1 Petr Matousek 2013-04-18 14:07:20 EDT
Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5

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.
Comment 2 Petr Matousek 2013-04-18 14:08:32 EDT
Created xen tracking bugs for this issue

Affects: fedora-all [bug 953633]
Comment 3 Fedora Update System 2013-05-04 22:24:52 EDT
xen-4.1.5-1.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Note You need to log in before you can comment on or make changes to this bug.