Bug 1015214 – CVE-2013-4399 libvirt: unprivileged user can crash libvirtd when ACLs are enabled

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Bug 1015214 - (CVE-2013-4399) CVE-2013-4399 libvirt: unprivileged user can crash libvirtd when ACLs are enabled

Summary:	CVE-2013-4399 libvirt: unprivileged user can crash libvirtd when ACLs are ena...

Status:	CLOSED NOTABUG

Aliases:	CVE-2013-4399

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

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

URL:
Whiteboard:	impact=moderate,public=20130927,repor...
Keywords:	Security

Depends On:	1011429
Blocks:
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Reported:	2013-10-03 12:41 EDT by Vincent Danen
Modified:	2013-10-03 12:47 EDT (History)
CC List:	4 users (show)

See Also:
Fixed In Version:	libvirt 1.1.3
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2013-10-03 12:47:31 EDT
Type:	---
Regression:	---
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Documentation:	---
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Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Vincent Danen 2013-10-03 12:41:54 EDT

It was discovered that an unprivileged user with read-only access to a libvirt guest could connect to it and, by disconnecting, cause a crash of the guest if the access-driver ACLs were defined in libvirtd.conf.  This was due libvirtd not removing event callbacks, which would continue to trigger after the client disconnects, which would cause predictable use of free memory, resulting in a crash.

This vulnerability was introduced in libvirt 1.1.0 and fixed in 1.1.3 [1].

[1] http://libvirt.org/git/?p=libvirt.git;a=commit;h=8294aa0c1750dcb49d6345cd9bd97bf421580d8b


Acknowledgements:

This issue was discovered by Zhenfang Wang of Red Hat.

Comment 1 Vincent Danen 2013-10-03 12:47:09 EDT

Statement:

Not vulnerable.

This issue did not affect the versions of libvirt package as shipped with Red Hat Enterprise Linux 5 and 6.

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