Bug 1195298 – CVE-2015-2045 xen: information leak via version information hypercall (XSA-122)

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Bug 1195298 - (CVE-2015-2045, xsa122) CVE-2015-2045 xen: information leak via version information hypercall (XSA-122)

Summary:	CVE-2015-2045 xen: information leak via version information hypercall (XSA-122)

Status:	CLOSED WONTFIX

Aliases:	CVE-2015-2045, xsa122

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

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

URL:
Whiteboard:	impact=low,public=20150306,reported=2...
Keywords:	Security

Depends On:
Blocks:	1195308
	Show dependency tree / graph

Reported:	2015-02-23 09:54 EST by Martin Prpič
Modified:	2015-03-09 04:43 EDT (History)
CC List:	9 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2015-02-24 06:45:14 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
XSA-122 upstream patch for CVE-2015-2045 (1.31 KB, text/plain) 2015-02-23 10:07 EST, Martin Prpič	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Martin Prpič 2015-02-23 09:54:51 EST

ISSUE DESCRIPTION
=================

The code handling certain sub-operations of the HYPERVISOR_xen_version
hypercall fails to fully initialize all fields of structures
subsequently copied back to guest memory. Due to this hypervisor stack
contents are copied into the destination of the operation, thus
becoming visible to the guest.

IMPACT
======

A malicious guest might be able to read sensitive data relating to
other guests.

VULNERABLE SYSTEMS
==================

Xen 3.2.x and later are vulnerable.
Xen 3.1.x and earlier have not been inspected.

Comment 1 Martin Prpič 2015-02-23 09:57:56 EST

Acknowledgements:

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

Comment 2 Martin Prpič 2015-02-23 10:07:15 EST

Created attachment 994405 [details]
XSA-122 upstream patch for CVE-2015-2045

Comment 4 Petr Matousek 2015-02-24 06:45:14 EST

Statement:

This issue does affect the Xen hypervisor as shipped with Red Hat Enterprise Linux 5.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 5 Martin Prpič 2015-03-06 04:22:04 EST

External References:

http://xenbits.xen.org/xsa/advisory-122.html

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