Bug 1244332 (CVE-2015-5158)

Summary:	CVE-2015-5158 Qemu: scsi stack buffer overflow
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	gmollett, juzhang, security-response-team, slong, xfu
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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:	2021-10-21 00:46:09 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1244334, 1246025
Bug Blocks:	1243329

Description Prasad Pandit 2015-07-17 19:33:59 UTC

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 Pandit 2015-07-23 10:31:54 UTC

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 Pandit 2015-07-23 10:33:00 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1246025]

Comment 4 Prasad Pandit 2015-07-23 10:53:21 UTC

Acknowledgements:

This issue was discovered by Donghai Zhu of Alibaba.

Comment 5 Fedora Update System 2015-08-18 05:16:46 UTC

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 16:40:23 UTC

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.