Bug 1840999 (CVE-2020-13362)

Summary:	CVE-2020-13362 QEMU: megasas: OOB read access due to invalid index leads to DoS
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	amit, berrange, cfergeau, dbecker, dwmw2, itamar, jen, jferlan, jforbes, jjoyce, jlyle, jmaloy, jschluet, kbasil, knoel, lhh, lpeer, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, ribarry, rjones, robinlee.sysu, sclewis, slinaber, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	QEMU 5.0.1	Doc Type:	If docs needed, set a value
Doc Text:	An out-of bounds read-access flaw was found in the MegaRAID SAS 8708EM2 emulator of the QEMU. This flaw occurs in the' megasas_lookup_frame' routine when the 's->reply_queue_head' is set to a malicious value. A guest user or process may use this flaw to crash the QEMU process on the host resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-05-28 11:20:30 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:	1841000, 1910695
Bug Blocks:	1772801

Description Prasad Pandit 2020-05-28 05:41:32 UTC

An OOB read access issue was found in the MegaRAID SAS 8708EM2 emulator of the QEMU. It occurs in 'megasas_lookup_frame' routine when 's->reply_queue_head' is set to a malicious value. A guest user/process may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg03463.html

Reference:
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  -> https://www.openwall.com/lists/oss-security/2020/05/28/2

Comment 1 Prasad Pandit 2020-05-28 05:41:39 UTC

Acknowledgments:

Name: Ren Ding (SSLab Georgia Tech), Hanqing Zhao (SSLab Georgia Tech), Alexander Bulekov

Comment 2 Prasad Pandit 2020-05-28 05:42:09 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1841000]

Comment 4 Product Security DevOps Team 2020-05-28 11:20:30 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13362