Bug 971503 (CVE-2013-2211)

Summary:	CVE-2013-2211 xen: libxl allows guest write access to sensitive console related xenstore keys
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	drjones, imammedo, mrezanin, pbonzini, security-response-team
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:	2013-06-21 13:04:50 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:	976779
Bug Blocks:	971508

Description Petr Matousek 2013-06-06 16:35:21 UTC

The libxenlight (libxl) toolstack library does not correctly set permissions on xenstore keys relating to paravirtualised and emulated serial console devices. This could allow a malicious guest administrator to change values in xenstore which the host later relies on being implicitly trusted.

Acknowledgements:

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

Comment 2 Petr Matousek 2013-06-06 16:39:49 UTC

Statement:

Not vulnerable.

This issue does not affect the versions of the xen package as shipped with Red Hat Enterprise Linux 5 as it does not provide support for the libxl toolstack.

This issue does not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG.

Comment 3 Petr Matousek 2013-06-21 12:42:25 UTC

Now public via:

http://seclists.org/oss-sec/2013/q2/608

Comment 4 Petr Matousek 2013-06-21 12:43:07 UTC

Created xen tracking bugs for this issue

Affects: fedora-all [bug 976779]

Comment 5 Petr Matousek 2013-06-26 07:29:33 UTC

CVE id has been assigned:

  http://seclists.org/oss-sec/2013/q2/612