Bug 906323 (CVE-2013-0215)

Summary: CVE-2013-0215 xen: oxenstored incorrect handling of certain Xenbus ring states
Product: [Other] Security Response Reporter: Petr Matousek <pmatouse>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jlieskov, security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,public=20130205,reported=20130123,source=upstream,cvss2=4.1/AV:A/AC:L/Au:S/C:P/I:N/A:P,rhel-5/xen=notaffected,fedora-all/xen=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Bug Depends On: 907888    
Bug Blocks: 906326    

Description Petr Matousek 2013-01-31 08:20:16 EST
The oxenstored daemon (the ocaml version of the xenstore daemon) does
not correctly handle unusual or malicious contents in the xenstore
ring.  A malicious guest can exploit this to cause oxenstored to read
past the end of the ring (and very likely crash) or to allocate large
amounts of RAM.

A malicious guest administrator can mount a denial of service attack
affecting domain control and management functions.

Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.
Comment 2 Petr Matousek 2013-01-31 08:26:11 EST
Statement:

This issue did not affect the versions of the xen package as shipped with Red Hat Enterprise Linux 5.
Comment 3 Petr Matousek 2013-02-05 08:29:35 EST
Created xen tracking bugs for this issue

Affects: fedora-all [bug 907888]
Comment 4 Fedora Update System 2013-02-15 20:23:59 EST
xen-4.1.4-4.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 5 Fedora Update System 2013-02-18 01:49:21 EST
xen-4.2.1-7.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.