Is UPnP vulnerable in DD-WRT?

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ColdBrew
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Joined: 20 Nov 2008
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Location: USA

PostPosted: Wed Jan 30, 2013 1:21    Post subject: Is UPnP vulnerable in DD-WRT? Reply with quote
Exploit found in UPnP.
https://community.rapid7.com/community/infosec/blog/2013/01/29/security-flaws-in-universal-plug-and-play-unplug-dont-play

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wonkawalken
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Joined: 15 Mar 2010
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PostPosted: Wed Jan 30, 2013 7:49    Post subject: Reply with quote
If I understand this correctly, this is about UPnP listening for requests on the WAN port?
Riffer
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Joined: 01 Mar 2008
Posts: 27

PostPosted: Wed Jan 30, 2013 8:16    Post subject: Reply with quote
Yes, you understand it right.
wonkawalken
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Joined: 15 Mar 2010
Posts: 14

PostPosted: Wed Jan 30, 2013 8:55    Post subject: Reply with quote
For what it’s worth, I scanned my DD-wrt (build 20548) from WAN and LAN with the instructions given in the article and it returned no vulnerabilities/CVEs.
blisk
DD-WRT Novice


Joined: 26 Jun 2006
Posts: 36

PostPosted: Wed Jan 30, 2013 15:38    Post subject: Reply with quote
wonkawalken wrote:
For what it’s worth, I scanned my DD-wrt (build 20548) from WAN and LAN with the instructions given in the article and it returned no vulnerabilities/CVEs.


Well that is good to know. Would be nice to know though if it had to be patched in the tree at some point. If so when would be good to know so we could know if we have a certain build (I'm on 20006) - say for example after build 20000 - it isn't an issue.
Simba7
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Joined: 09 Oct 2007
Posts: 32

PostPosted: Wed Jan 30, 2013 19:16    Post subject: Reply with quote
It's amazing that people freak out about the littlest things.. or that "Homeland inSecurity" uses this as a scare tactic.

Truthfully, why would you have a UPnP service on the WAN port in any scenario? This is just asking for trouble. There is no issue whatsoever if it's running on the LAN port(s). *sigh*

I wouldn't be surprised if HS got chewed out by the IT community for using this BS tactic.. because we all know that HS is looking out for us. [/sarcasm]
crashfly
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Joined: 24 Feb 2009
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Location: Sol System > Earth > USA > Arkansas

PostPosted: Wed Jan 30, 2013 19:23    Post subject: Reply with quote
blisk wrote:
Well that is good to know. Would be nice to know though if it had to be patched in the tree at some point. If so when would be good to know so we could know if we have a certain build (I'm on 20006) - say for example after build 20000 - it isn't an issue.

I do not think that it has ever been a problem in DD-WRT, that is unless iptables is configured incorrectly. You have to remember that DD-WRT is based on Linux. Except for misconfigurations, Linux is a very secure OS.

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RMerlin
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Joined: 05 Mar 2012
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PostPosted: Wed Jan 30, 2013 22:29    Post subject: Reply with quote
They would have you install Java on your computer to scan for vulnerabilities. Ironic, isn't it?
Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1157

PostPosted: Thu Jan 31, 2013 0:41    Post subject: Reply with quote
RMerlin wrote:
They would have you install Java on your computer to scan for vulnerabilities. Ironic, isn't it?


This vulnerability is not present in current DD-WRT builds, I have tested it against my builds and my new one I am about to release and both come back clean.

-Fractal
LOM
DD-WRT Guru


Joined: 28 Dec 2008
Posts: 7020

PostPosted: Thu Jan 31, 2013 0:45    Post subject: Reply with quote
blisk wrote:

Well that is good to know. Would be nice to know though if it had to be patched in the tree at some point. If so when would be good to know so we could know if we have a certain build (I'm on 20006) - say for example after build 20000 - it isn't an issue.


Just flash those older builds that you are worried about, test for the vulnerability and report back here.
RMerlin
DD-WRT User


Joined: 05 Mar 2012
Posts: 263

PostPosted: Thu Jan 31, 2013 0:46    Post subject: Reply with quote
Fractal wrote:
RMerlin wrote:
They would have you install Java on your computer to scan for vulnerabilities. Ironic, isn't it?


This vulnerability is not present in current DD-WRT builds, I have tested it against my builds and my new one I am about to release and both come back clean.

-Fractal


AFAIK, only older versions of miniupnpd are affected. DD-WRT is usually doing an excellent job at keeping up with newer versions of the services it uses. Tomato's version 1.6 is also fine. I haven't tested mine yet, but I intend to upgrade to miniupnpd 1.6 anyway, just to be on the safe side.
23skidoo
DD-WRT Novice


Joined: 11 Feb 2013
Posts: 1

PostPosted: Mon Feb 11, 2013 6:38    Post subject: Reply with quote
I have build 14929 std-nokaid installed on my WRT160N v1, with basically the default configuration (all I did was change the SSID, set wireless security to WPA2+AES, and set a passphrase). I ran the Rapid7 UPnP Check and it is not vulnerable.
ColdBrew
DD-WRT Novice


Joined: 20 Nov 2008
Posts: 17
Location: USA

PostPosted: Mon Feb 11, 2013 13:49    Post subject: Reply with quote
23skidoo wrote:
I have build 14929 std-nokaid installed on my WRT160N v1, with basically the default configuration (all I did was change the SSID, set wireless security to WPA2+AES, and set a passphrase). I ran the Rapid7 UPnP Check and it is not vulnerable.


Is UPnP enabled? I can't remember if it is enabled by default.

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buddee
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Joined: 06 Feb 2010
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Location: Little Rock

PostPosted: Mon Feb 11, 2013 14:21    Post subject: Reply with quote
Not enabled by default..
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