Bug 1062329 (CVE-2014-1895) - CVE-2014-1895 xen: Off-by-one error in FLASK_AVC_CACHESTAT hypercall (xsa-85)
Summary: CVE-2014-1895 xen: Off-by-one error in FLASK_AVC_CACHESTAT hypercall (xsa-85)
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2014-1895
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1062335
Blocks: 1062332
TreeView+ depends on / blocked
 
Reported: 2014-02-06 16:45 UTC by Petr Matousek
Modified: 2023-05-12 02:32 UTC (History)
18 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-02-06 16:46:40 UTC
Embargoed:


Attachments (Terms of Use)

Description Petr Matousek 2014-02-06 16:45:22 UTC
The FLASK_AVC_CACHESTAT hypercall, which provides access to per-cpu statistics on the Flask security policy, incorrectly validates the CPU for which statistics are being requested.

An attacker can cause the hypervisor to read past the end of an array. This may result in either a host crash, leading to a denial of service, or access to a small and static region of hypervisor memory, leading to an information leak. 

External reference:

http://seclists.org/oss-sec/2014/q1/263

Acknowledgements:

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

Comment 1 Petr Matousek 2014-02-06 16:46:40 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 Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2 as we did not have support for Xen hypervisor.

Comment 2 Petr Matousek 2014-02-06 16:59:25 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1062335]

Comment 3 Murray McAllister 2014-02-10 01:00:07 UTC
This was assigned CVE-2014-1895: http://seclists.org/oss-sec/2014/q1/283


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