Bug 1140266 – CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)

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Bug 1140266 - (CVE-2014-7155) CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)

Summary:	CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, L...

Status:	CLOSED NOTABUG

Aliases:	CVE-2014-7155

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	high Severity high
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=important,public=20140923,repo...
Keywords:	Security

Depends On:	1145737
Blocks:	1140259
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Reported:	2014-09-10 11:32 EDT by Petr Matousek
Modified:	2014-09-25 05:22 EDT (History)
CC List:	8 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-09-10 11:34:32 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Petr Matousek 2014-09-10 11:32:11 EDT

The emulation of the instructions HLT, LGDT, LIDT, and LMSW fails to
perform supervisor mode permission checks.

Malicious HVM guest user mode code may be able to crash the guest or
escalate its own privilege to guest kernel mode.

Acknowledgements:

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

Comment 3 Petr Matousek 2014-09-10 11:34:32 EDT

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 11:22:14 EDT

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1145737]

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