Bug 1141131 – CVE-2014-3633 libvirt: qemu: out-of-bounds read access in qemuDomainGetBlockIoTune() due to invalid index

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Bug 1141131 - (CVE-2014-3633) CVE-2014-3633 libvirt: qemu: out-of-bounds read access in qemuDomainGetBlockIoTune() due to invalid index

Summary:	CVE-2014-3633 libvirt: qemu: out-of-bounds read access in qemuDomainGetBlockI...

Status:	CLOSED ERRATA

Aliases:	CVE-2014-3633

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=20140917,repor...
Keywords:	Security

Depends On:	1140724 1141134 1143891 1160278 1160823
Blocks:	1141096 1143903 1160286
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Reported:	2014-09-12 05:37 EDT by Petr Matousek
Modified:	2015-06-01 08:49 EDT (History)
CC List:	18 users (show)

See Also:	1162721
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	An out-of-bounds read flaw was found in the way libvirt's qemuDomainGetBlockIoTune() function looked up the disk index in a non-persistent (live) disk configuration while a persistent disk configuration was being indexed. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, leak memory from the libvirtd process.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2014-11-18 16:49:43 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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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2014:1352	normal	SHIPPED_LIVE	Moderate: libvirt security and bug fix update	2014-10-01 19:11:16 EDT
Red Hat Product Errata	RHSA-2014:1873	normal	SHIPPED_LIVE	Moderate: libvirt security and bug fix update	2014-11-18 18:08:55 EST

Groups: None (edit)

Description Petr Matousek 2014-09-12 05:37:10 EDT

It was found that when a disk is attached to a disk "live" (thus not
written into the persistent configuration) and then the statistics for
the disks are requested from the persistent configuration, index to
the array is determined from the live configuration but used in the
persistent.

A remote attacker able to establish a read-only connection to libvirtd
could use this flaw to crash libvirtd or, potentially, leak memory from
the libvirtd process.

Acknowledgements:

This issue was discovered by Luyao Huang of Red Hat.

Comment 1 Petr Matousek 2014-09-12 05:38:43 EDT

Statement:

This issue does not affect the versions of libvirt packages as shipped with
Red Hat Enterprise Linux 5.

This issue does affect the versions of libvirt packages as shipped with Red Hat
Enterprise Linux 6 and 7. Future updates may address this issue in the
respective Red Hat Enterprise Linux releases.

Comment 4 Petr Matousek 2014-09-18 04:30:15 EDT

Upstream commit:
  http://libvirt.org/git/?p=libvirt.git;a=commit;h=3e745e8f775dfe6f64f18b5c2fe4791b35d3546b

Comment 5 Martin Prpič 2014-09-30 11:37:28 EDT

IssueDescription:

An out-of-bounds read flaw was found in the way libvirt's qemuDomainGetBlockIoTune() function looked up the disk index in a non-persistent (live) disk configuration while a persistent disk configuration was being indexed. A remote attacker able to establish a read-only connection to libvirtd could use this flaw to crash libvirtd or, potentially, leak memory from the libvirtd process.

Comment 6 errata-xmlrpc 2014-10-01 15:11:33 EDT

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2014:1352 https://rhn.redhat.com/errata/RHSA-2014-1352.html

Comment 8 Petr Matousek 2014-11-05 12:32:40 EST

Created libvirt tracking bugs for this issue:

Affects: fedora-all [bug 1160823]

Comment 9 errata-xmlrpc 2014-11-18 13:09:11 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1873 https://rhn.redhat.com/errata/RHSA-2014-1873.html

Comment 10 Fedora Update System 2014-11-22 07:37:10 EST

libvirt-1.1.3.8-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

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