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Bug 1329538 - (CVE-2016-7909) CVE-2016-7909 Qemu: net: pcnet: infinite loop in pcnet_rdra_addr()
CVE-2016-7909 Qemu: net: pcnet: infinite loop in pcnet_rdra_addr()
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=20160930,reported=2...
: Security
: 1329596 (view as bug list)
Depends On: 1381196
Blocks: 1326713
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Reported: 2016-04-22 04:01 EDT by Adam Mariš
Modified: 2017-07-31 01:32 EDT (History)
45 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2017-02-07 02:32:33 EST
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
GDB report (1.31 KB, text/plain)
2016-04-22 04:15 EDT, Adam Mariš 		no flags Details
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Description Adam Mariš 2016-04-22 04:01:01 EDT 
Quick Emulator(Qemu) built with the AMD PC-Net II emulator support is vulnerable to an infinite loop issue. It could occur while receiving packets via pcnet_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/2016-09/msg07942.html
Comment 1 Adam Mariš 2016-04-22 04:01:23 EDT 
Acknowledgments:

Name: Li Qiang (Qihoo 360 Inc.)
Comment 2 Adam Mariš 2016-04-22 04:15 EDT 
Created attachment 1149665 [details]
GDB report
Comment 4 Prasad J Pandit 2016-10-03 07:48:07 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1381196]
Comment 5 Andrej Nemec 2016-10-04 04:08:06 EDT 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/12
Comment 6 Cole Robinson 2017-01-16 13:15:45 EST 
commit 34e29ce754c02bb6b3bdd244fbb85033460feaff
Author: Prasad J Pandit <pjp@fedoraproject.org>
Date:   Fri Sep 30 00:27:33 2016 +0530

    net: pcnet: check rx/tx descriptor ring length
Comment 7 Prasad J Pandit 2017-02-07 02:30:52 EST 
*** Bug 1329596 has been marked as a duplicate of this bug. ***
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