Bug 1164253 – CVE-2014-8866 xen: Excessive checking in compatibility mode hypercall argument translation (xsa111)

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Bug 1164253 - (CVE-2014-8866, xsa111) CVE-2014-8866 xen: Excessive checking in compatibility mode hypercall argument translation (xsa111)

Summary:	CVE-2014-8866 xen: Excessive checking in compatibility mode hypercall argumen...

Status:	CLOSED NOTABUG

Aliases:	CVE-2014-8866, xsa111

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=20141127,repo...
Keywords:	Security

Depends On:
Blocks:	1164260
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Reported:	2014-11-14 08:22 EST by Petr Matousek
Modified:	2014-11-27 09:20 EST (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-11-14 08:24:37 EST
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 2014-11-14 08:22:03 EST

The hypercall argument translation needed for 32-bit guests running on
64-bit hypervisors performs checks on the final register state. These
checks cover all registers potentially holding hypercall arguments,
not just the ones actually doing so for the hypercall being processed,
since the code was originally intended for use only by PV guests.

A buggy or malicious HVM guest can crash the host.

Acknowledgements:

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

Comment 3 Petr Matousek 2014-11-14 08:24:37 EST

Statement:

Not vulnerable.

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

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