Bug 1400829 (CVE-2016-9776)

Summary:	CVE-2016-9776 Qemu: net: mcf_fec: infinite loop while receiving data in mcf_fec_receive
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit.shah, aortega, apevec, areis, ayoung, berrange, cfergeau, chrisw, crobinso, cvsbot-xmlrpc, drjones, dwmw2, imammedo, itamar, jen, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, rbalakri, rbryant, rjones, rkrcmar, sclewis, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-02-07 07:41:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1400830
Bug Blocks:	1326713

Description Prasad Pandit 2016-12-02 07:58:31 UTC

Quick Emulator(Qemu) built with the ColdFire Fast Ethernet Controller emulator
support is vulnerable to an infinite loop issue. It could occur while receiving
packets in 'mcf_fec_receive'.

A privileged user/process inside guest could use this issue to crash the Qemu
process on the host leading to DoS.

Upstream patch
--------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg05324.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/12/02/3

Comment 1 Prasad Pandit 2016-12-02 07:59:06 UTC

Acknowledgments:

Name: Wjjzhang (tencent.com)

Comment 2 Prasad Pandit 2016-12-02 08:00:14 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1400830]

Comment 3 Cole Robinson 2017-01-16 18:38:10 UTC

commit 77d54985b85a0cb760330ec2bd92505e0a2a97a9
Author: Prasad J Pandit <pjp>
Date:   Tue Nov 29 00:38:39 2016 +0530

    net: mcf: check receive buffer size register value

Comment 4 Prasad Pandit 2017-02-07 07:38:57 UTC

*** Bug 1399531 has been marked as a duplicate of this bug. ***