Bug 1140271 (CVE-2014-7156)

Summary:	CVE-2014-7156 kernel: xen: Missing privilege level checks in x86 emulation of software interrupts (XSA-106)
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	drjones, imammedo, jrusnack, pbonzini, rkrcmar, security-response-team, vkaigoro, vkuznets
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:	2014-09-10 15:43:09 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:	1145738
Bug Blocks:	1140259

Description Petr Matousek 2014-09-10 15:39:24 UTC

The emulation of instructions which generate software interrupts fails
to perform supervisor mode permission checks.

Malicious HVM guest user mode code may be able to crash the guest.

Acknowledgements:

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

Comment 3 Petr Matousek 2014-09-10 15:43:09 UTC

Statement:

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

Comment 4 Petr Matousek 2014-09-23 15:22:32 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1145738]