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: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: drjones, imammedo, jrusnack, pbonzini, rkrcmar, security-response-team, vkaigoro, vkuznets
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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:
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.


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

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

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]