Bug 953632 (CVE-2013-1964) - CVE-2013-1964 xen: grant table hypercall acquire/release imbalance
Summary: CVE-2013-1964 xen: grant table hypercall acquire/release imbalance
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2013-1964
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 953633
Blocks: 953634
TreeView+ depends on / blocked
 
Reported: 2013-04-18 18:06 UTC by Petr Matousek
Modified: 2021-02-17 07:47 UTC (History)
27 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-06-06 16:22:08 UTC


Attachments (Terms of Use)

Description Petr Matousek 2013-04-18 18:06:26 UTC
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 18:07:20 UTC
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 18:08:32 UTC
Created xen tracking bugs for this issue

Affects: fedora-all [bug 953633]

Comment 3 Fedora Update System 2013-05-05 02:24:52 UTC
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.


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