Bug 1244332 – CVE-2015-5158 Qemu: scsi stack buffer overflow

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Bug 1244332 - (CVE-2015-5158) CVE-2015-5158 Qemu: scsi stack buffer overflow

Summary:	CVE-2015-5158 Qemu: scsi stack buffer overflow

Status:	NEW

Aliases:	CVE-2015-5158

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=20150722,repor...
Keywords:	Security

Depends On:	1244334 1246025
Blocks:	1243329
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Reported:	2015-07-17 15:33 EDT by Prasad J Pandit
Modified:	2015-08-25 01:07 EDT (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	A flaw has been discovered in the QEMU emulator built with SCSI-device emulation support. The emulator is vulnerable to a stack buffer overflow issue, which can occur while parsing a SCSI command descriptor block with an invalid operation code. A privileged(CAP_SYS_RAWIO) user inside a guest could use this flaw to crash the QEMU instance resulting in a denial-of-service (DoS) attack.
Story Points:	---
Clone Of:
Environment:
Last Closed:
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 Prasad J Pandit 2015-07-17 15:33:59 EDT

Qemu emulator built with the SCSI device emulation support is vulnerable to a
stack buffer overflow issue. It could occur while parsing SCSI command
descriptor block with an invalid operation code.

A privileged(CAP_SYS_RAWIO) user inside guest could use this flaw to crash
the Qemu instance resulting in DoS.

Upstream fix:
-------------
  -> git.qemu.org/?p=qemu.git;a=commit;h=c170aad8b057223b1139d72e5ce7acceafab4fa9

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2015/07/23/6

Comment 2 Prasad J Pandit 2015-07-23 06:31:54 EDT

Statement: 

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

This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6 and 7.

This issue does not affect the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This issue does not affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

Comment 3 Prasad J Pandit 2015-07-23 06:33:00 EDT

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1246025]

Comment 4 Prasad J Pandit 2015-07-23 06:53:21 EDT

Acknowledgements:

This issue was discovered by Donghai Zhu of Alibaba.

Comment 5 Fedora Update System 2015-08-18 01:16:46 EDT

qemu-2.3.1-1.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2015-08-23 12:40:23 EDT

qemu-2.4.0-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

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