Bug 1104835 (CVE-2014-3970)

Summary: CVE-2014-3970 pulseaudio: denial of service in module-rtp-recv
Product: [Other] Security Response Reporter: Vincent Danen <vdanen>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: brendan.jones.it, jkurik, lkundrak, lpoetter, pachoramos1, rdieter, wtaymans
Target Milestone: ---Keywords: Patch, Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-22 15:54:40 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: 1108011, 1108013    
Bug Blocks: 1104836    
Attachments:
Description Flags
possible patch none

Description Vincent Danen 2014-06-04 18:58:13 UTC 
It was reported [1],[2] that PulseAudio suffers from a remote denial of service if the module-rtp-recv module is loaded.  A remote attacker could crash this instance of PulseAudio by sending an empty UDP packet to the multicast address that module-rtp-recv is listening (due to a previous SAP/SDP announcement).  The problematic code is in the pa_rtp_recv() function [3], when it handles the results of the FIONREAD ioctl.

The problem has existed in PulseAudio since 2006-04-16 (git commit f1ddf0523, so probably around 0.8.1).

A potential patch has been submitted upstream [4] but has not yet been accepted.

[1] http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-May/020740.html
[2] http://openwall.com/lists/oss-security/2014/06/04/8
[3] http://cgit.freedesktop.org/pulseaudio/pulseaudio/tree/src/modules/rtp/rtp.c#n185
[4] http://lists.freedesktop.org/archives/pulseaudio-discuss/2014-May/020741.html
Comment 1 Wim Taymans 2014-06-06 13:17:17 UTC 
Created attachment 902932 [details]
possible patch

I have attached a patch, I would update the package myself but I'm still waiting for write access to the git repository.
Comment 2 Wim Taymans 2014-06-06 13:20:47 UTC 
.. for Fedora, I forgot to mention.
Comment 3 Stefan Cornelius 2014-06-11 09:53:52 UTC 
The patch made it upstream:
http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=26b9d22dd24c17eb118d0205bf7b02b75d435e3c
Comment 4 Stefan Cornelius 2014-06-11 09:55:16 UTC 
Created pulseaudio tracking bugs for this issue:

Affects: fedora-all [bug 1108011]
Comment 5 Stefan Cornelius 2014-06-11 09:56:08 UTC 
Created pulseaudio tracking bugs for this issue:

Affects: epel-5 [bug 1108013]
Comment 7 Fedora Update System 2014-07-26 00:09:56 UTC 
qemu-1.6.2-7.fc20, java-1.7.0-openjdk-1.7.0.65-2.5.1.3.fc20, qt-4.8.6-9.fc20.1, qt5-qtmultimedia-5.3.1-1.fc20.1, gnome-shell-3.10.4-7.fc20, gnome-settings-daemon-3.10.3-2.fc20, control-center-3.10.3-2.fc20, empathy-3.10.3-2.fc20, gstreamer1-plugins-good-1.2.4-2.fc20, speech-dispatcher-0.8-9.fc20, spice-gtk-0.23-3.fc20, sphinxtrain-1.0.8-13.fc20, guacamole-server-0.8.4-3.fc20, audacious-plugins-3.4.3-2.fc20, paprefs-0.9.10-7.fc20, fldigi-3.21.83-2.fc20, qmmp-0.7.7-1.fc20.1, mumble-1.2.6-1.fc20.1, libmikmod-3.3.6-3.fc20, minimodem-0.19-3.fc20, sidplayfp-1.2.0-2.fc20, xmp-4.0.7-2.fc20, gqrx-2.2.0-6.fc20, cinnamon-settings-daemon-2.2.4-2.fc20, cinnamon-control-center-2.2.10-1.fc20.1, cinnamon-2.2.14-5.fc20, phonon-4.7.2-1.fc20.1, qt-mobility-1.2.2-0.16.20140317git169da60c.fc20, fluidsynth-1.1.6-4.fc20, ffgtk-0.8.6-7.fc20, pulseaudio-5.0-7.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 8 Vincent Danen 2015-08-22 15:54:27 UTC 
Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.