Bug 910883 (CVE-2013-0216, CVE-2013-0217)

Summary:	CVE-2013-0216 CVE-2013-0217 kernel: xen: Linux netback DoS via malicious guest ring.
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, anton, bfan, dhoward, drjones, imammedo, jforbes, kernel-mgr, kraxel, leiwang, lersek, lwang, m.a.young, moli, pbonzini, plougher, qguan, rvrbovsk, sforsber, virt-maint, wshi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-04-16 19:25:08 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	910884, 910885, 910886
Bug Blocks:	910879

Description Petr Matousek 2013-02-13 19:15:33 UTC

The Xen netback implementation contains a couple of flaws which can allow a guest to cause a DoS in the backend domain, potentially affecting other domains in the system.

CVE-2013-0216 is a failure to sanity check the ring producer/consumer pointers which can allow a guest to cause netback to loop for an extended period preventing other work from occurring.

CVE-2013-0217 is a memory leak on an error path which is guest triggerable.

A malicious guest with access to PV network devices can mount a DoS affecting the entire system.

Acknowledgements:

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

Comment 2 Petr Matousek 2013-02-13 19:20:23 UTC

Created kernel tracking bugs for this issue

Affects: fedora-all [bug 910886]

Comment 4 Petr Matousek 2013-02-13 19:25:48 UTC

Statement CVE-2013-0216:

This issue did 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.

Comment 5 Petr Matousek 2013-02-13 19:26:11 UTC

Statement CVE-2013-0217: 

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.

Comment 19 errata-xmlrpc 2013-04-16 19:04:41 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2013:0747 https://rhn.redhat.com/errata/RHSA-2013-0747.html