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Bug 1400829 - (CVE-2016-9776) CVE-2016-9776 Qemu: net: mcf_fec: infinite loop while receiving data in mcf_fec_receive
CVE-2016-9776 Qemu: net: mcf_fec: infinite loop while receiving data in mcf_f...
Status: CLOSED UPSTREAM
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20161129,reported=2...
: Security
: 1399531 (view as bug list)
Depends On: 1400830
Blocks: 1326713
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Reported: 2016-12-02 02:58 EST by Prasad J Pandit
Modified: 2017-02-07 02:41 EST (History)
38 users (show)

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Last Closed: 2017-02-07 02:41:28 EST
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Description Prasad J Pandit 2016-12-02 02:58:31 EST 
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:
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  -> http://www.openwall.com/lists/oss-security/2016/12/02/3
Comment 1 Prasad J Pandit 2016-12-02 02:59:06 EST 
Acknowledgments:

Name: Wjjzhang (tencent.com)
Comment 2 Prasad J Pandit 2016-12-02 03:00:14 EST 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1400830]
Comment 3 Cole Robinson 2017-01-16 13:38:10 EST 
commit 77d54985b85a0cb760330ec2bd92505e0a2a97a9
Author: Prasad J Pandit <pjp@fedoraproject.org>
Date:   Tue Nov 29 00:38:39 2016 +0530

    net: mcf: check receive buffer size register value
Comment 4 Prasad J Pandit 2017-02-07 02:38:57 EST 
*** Bug 1399531 has been marked as a duplicate of this bug. ***
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