Bug 1078848 – CVE-2014-0147 Qemu: block: possible crash due signed types or logic error

Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.

Bug 1078848 - (CVE-2014-0147) CVE-2014-0147 Qemu: block: possible crash due signed types or logic error

Summary:	CVE-2014-0147 Qemu: block: possible crash due signed types or logic error

Status:	CLOSED ERRATA

Aliases:	CVE-2014-0147

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=20140326,repor...
Keywords:	Security

Depends On:	1079335 1079336 1079337 1079338 1079339 1086717 1087112 1087126 1087140 1108461
Blocks:	1066967 1086694
	Show dependency tree / graph

Reported:	2014-03-20 08:10 EDT by Prasad J Pandit
Modified:	2016-01-27 08:10 EST (History)
CC List:	13 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-01-27 08:10:08 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)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2014:0420	normal	SHIPPED_LIVE	Moderate: qemu-kvm security update	2014-04-22 17:39:52 EDT
Red Hat Product Errata	RHSA-2014:0421	normal	SHIPPED_LIVE	Moderate: qemu-kvm-rhev security update	2014-04-22 17:39:32 EDT
Red Hat Product Errata	RHSA-2014:0434	normal	SHIPPED_LIVE	Moderate: qemu-kvm-rhev security update	2014-04-24 17:35:56 EDT
Red Hat Product Errata	RHSA-2014:0435	normal	SHIPPED_LIVE	Moderate: qemu-kvm-rhev security update	2014-04-24 17:35:47 EDT
Red Hat Product Errata	RHSA-2014:0674	normal	SHIPPED_LIVE	Moderate: rhev-hypervisor6 3.4.0 security, bug fix, and enhancement update	2014-06-09 14:35:12 EDT

Groups: None (edit)

Description Prasad J Pandit 2014-03-20 08:10:51 EDT

Qemu block diver for the various disk image formats used by Bochs and for the
QCOW version 2 format, are vulnerable to a possible crash caused by signed data
types or a logic error while creating QCOW2 snapshots, which leads to
incorrectly calling update_refcount() routine.

An user able to alter the Qemu disk image files loaded by a guest could use
this flaw to crash the Qemu instance resulting in DoS or corrupt QEMU process
memory on the host, which could potentially result in arbitrary code execution
on the host with the privileges of the QEMU process.

Upstream fix:
-------------
qcow2: Don't rely on free_cluster_index in alloc_refcount_bl
  -> http://git.qemu.org/?p=qemu.git;a=commit;h=b106ad9185f35fc4ad669555ad0e79e276083bd7

bochs: Use unsigned variables for offsets and sizes
  -> http://git.qemu.org/?p=qemu.git;a=commit;h=246f65838d19db6db55bfb41117c35645a2c4789

Comment 1 Prasad J Pandit 2014-03-21 06:33:34 EDT

Statement:

This issue affects the versions of kvm package as shipped with Red Hat
Enterprise Linux 5.

This issue affects the versions of qemu-kvm package as shipped with Red Hat
Enterprise Linux 6.

Comment 5 Prasad J Pandit 2014-03-25 09:22:03 EDT

Acknowledgement:

These issues were discovered by Kevin Wolf of Red Hat Inc.

Comment 6 Prasad J Pandit 2014-04-11 07:28:51 EDT

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1086717]

Comment 10 errata-xmlrpc 2014-04-22 13:41:13 EDT

This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2014:0421 https://rhn.redhat.com/errata/RHSA-2014-0421.html

Comment 11 errata-xmlrpc 2014-04-22 13:42:10 EDT

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:0420 https://rhn.redhat.com/errata/RHSA-2014-0420.html

Comment 12 errata-xmlrpc 2014-04-24 13:37:27 EDT

This issue has been addressed in following products:

  OpenStack 3 for RHEL 6

Via RHSA-2014:0435 https://rhn.redhat.com/errata/RHSA-2014-0435.html

Comment 13 errata-xmlrpc 2014-04-24 13:38:30 EDT

This issue has been addressed in following products:

  OpenStack 4 for RHEL 6

Via RHSA-2014:0434 https://rhn.redhat.com/errata/RHSA-2014-0434.html

Comment 14 Fedora Update System 2014-05-01 18:26:51 EDT

qemu-1.6.2-4.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 15 errata-xmlrpc 2014-06-09 10:37:35 EDT

This issue has been addressed in following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2014:0674 https://rhn.redhat.com/errata/RHSA-2014-0674.html

Note You need to log in before you can comment on or make changes to this bug.