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Bug 1329538 (CVE-2016-7909) - CVE-2016-7909 Qemu: net: pcnet: infinite loop in pcnet_rdra_addr()
Summary: CVE-2016-7909 Qemu: net: pcnet: infinite loop in pcnet_rdra_addr()
Alias: CVE-2016-7909
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
: 1329596 (view as bug list)
Depends On: 1381196
TreeView+ depends on / blocked
Reported: 2016-04-22 08:01 UTC by Adam Mariš
Modified: 2021-02-17 04:00 UTC (History)
44 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2017-02-07 07:32:33 UTC

Attachments (Terms of Use)
GDB report (deleted)
2016-04-22 08:15 UTC, Adam Mariš
no flags Details

Description Adam Mariš 2016-04-22 08:01:01 UTC
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

Comment 1 Adam Mariš 2016-04-22 08:01:23 UTC

Name: Li Qiang (Qihoo 360 Inc.)

Comment 2 Adam Mariš 2016-04-22 08:15:26 UTC
Created attachment 1149665 [details]
GDB report

Comment 4 Prasad Pandit 2016-10-03 11:48:07 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1381196]

Comment 5 Andrej Nemec 2016-10-04 08:08:06 UTC
CVE assignment:

Comment 6 Cole Robinson 2017-01-16 18:15:45 UTC
commit 34e29ce754c02bb6b3bdd244fbb85033460feaff
Author: Prasad J Pandit <pjp>
Date:   Fri Sep 30 00:27:33 2016 +0530

    net: pcnet: check rx/tx descriptor ring length

Comment 7 Prasad Pandit 2017-02-07 07:30:52 UTC
*** Bug 1329596 has been marked as a duplicate of this bug. ***

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