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Bug 100519 - net-im/centericq: 4.20.0-r3 remote crash (CVE-2005-3694)
Summary: net-im/centericq: 4.20.0-r3 remote crash (CVE-2005-3694)
Alias: None
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: High minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [glsa] jaervosz
Depends on: 114038
  Show dependency tree
Reported: 2005-07-27 14:42 UTC by Wernfried Haas (RETIRED)
Modified: 2005-12-20 03:09 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---

centericq PoC "exploit" (w00t.c,809 bytes, text/plain)
2005-07-28 11:55 UTC, Stefan Cornelius (RETIRED)
no flags Details

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Description Wernfried Haas (RETIRED) gentoo-dev 2005-07-27 14:42:32 UTC
Centericq segfaults under certain circumstances. I've tracked them down to some,
but i'm not sure how easy it is to reproduce the crash.

1. centericq must be running and connected to some icq server (Server : here)
2. There should be direct connection to the internet (not behind a
router/masquerading). Not sure exactly when it (doesn't) work, but centericq
opens a port for icq messages.
3. Find port with netstat -tlp |grep centericq - let's say it's 38096 in this
4. Start nessus on same box or somewhere on the lan (haven't tried it from a
completely different host on the internet)
5. Use a port range that is the port -1 until the port +1 (in this case 38095 to
38097). Check nmap scan in Scan options. The port range may also be bigger than
that, but selecting only the port doesn't seem to work. This may be more a
problem with the way nessus works though.
6. Check Plugins -> Service detection -> Services. No other plugins necessary.
7. Nessus does some probes, centericq segfaults.

I hope someone can reproduce the problem, if you're not able to you can also
ping me on irc.
Comment 1 Wernfried Haas (RETIRED) gentoo-dev 2005-07-27 15:24:07 UTC
DerCorny just found out the option "Enable peer-to-peer communications" needs to
be set to yes for the listening port to appear. It seems to be set to no by
default. We've been able to verify the Segfault on his box.
Comment 2 Stefan Cornelius (RETIRED) gentoo-dev 2005-07-28 11:55:25 UTC
Created attachment 64566 [details]
centericq PoC "exploit"
Comment 3 Stefan Cornelius (RETIRED) gentoo-dev 2005-07-28 11:58:26 UTC
well yeah, check my dirty attachment. sends nothing but 0x01 to centericq and
crashes it. i had not enough time to find out where exactly it crashes, but i
guess during Client::ParseCh2 in Client.cpp of the icq2000-lib, but i'm not sure.
Comment 4 Wernfried Haas (RETIRED) gentoo-dev 2005-08-26 15:39:41 UTC
This has been around for a month now, any activity on this? If not, what about
just reporting it upstream so they can fix it?
Comment 5 Sune Kloppenborg Jeppesen (RETIRED) gentoo-dev 2005-09-08 23:24:08 UTC
Auditors you want to check on this or should we CC upstream?  
Comment 6 Tavis Ormandy (RETIRED) gentoo-dev 2005-09-19 05:45:15 UTC
Rob confirms this, moving into vulnerabilities.
Comment 7 Thierry Carrez (RETIRED) gentoo-dev 2005-09-20 00:54:17 UTC
Someone volunteers to push it upstream ?
Comment 8 Thierry Carrez (RETIRED) gentoo-dev 2005-09-27 07:28:52 UTC
Mail sent to upstream.
Comment 9 Thierry Carrez (RETIRED) gentoo-dev 2005-10-04 05:50:25 UTC
No news, Wolfram, could you check with your upstream friends what they are up to ?
Comment 10 Wolfram Schlich (RETIRED) gentoo-dev 2005-10-06 03:11:34 UTC
the only reaction from thekonst so far:

"I am on business trip in California now"
"actually, I don't even know what crash it is about"

I know it's not our job, but can someone here produce
a patch that we can send him? I fear otherwise nothing
will happen soon... :-(
Comment 11 Sune Kloppenborg Jeppesen (RETIRED) gentoo-dev 2005-10-06 03:19:39 UTC
Tigger/Taviso/Vapier/Solar will you patch or recommend a mask? 
Comment 12 Thierry Carrez (RETIRED) gentoo-dev 2005-10-07 01:08:04 UTC
centericq probably misses several sanity checks on that connection, so it's more
a rewrite than a patch. If upstream fails to see the need, we should probably
mask it (but that implies going public).
Comment 13 Thierry Carrez (RETIRED) gentoo-dev 2005-10-12 09:01:54 UTC
If it's just a crash I don't think it's worth masking... Maybe documenting the
option as unsafe ?

Auditors: any chance this can be used to execute code ?

If nobody complains, I'll open this tomorrow Thursday at 1400 UTC, since it's
not a big deal anyway.
Comment 14 Thierry Carrez (RETIRED) gentoo-dev 2005-10-13 09:07:53 UTC
Comment 15 Sune Kloppenborg Jeppesen (RETIRED) gentoo-dev 2005-10-21 23:46:24 UTC
wolfram/wernfried could you put a warning somewhere in the documentation?  
Changing component until someone shows that RCE is possible. Feel free to 
change it back if you disagree. 
Comment 16 Sune Kloppenborg Jeppesen (RETIRED) gentoo-dev 2005-11-20 13:04:18 UTC
wschlich please provide an updated ebuild with the Debian patch. 
Comment 17 Thierry Carrez (RETIRED) gentoo-dev 2005-11-21 01:28:37 UTC
Let's put it back in "Vulnerabilities" scope
Comment 18 Wolfram Schlich (RETIRED) gentoo-dev 2005-11-25 06:38:36 UTC
Sorry for the delay, I'm working on it...
Comment 19 Wolfram Schlich (RETIRED) gentoo-dev 2005-11-25 06:58:43 UTC
Committed =net-im/centericq-4.21.0-r1 archmasked, so the arches can check and
mark it stable.

Arches are: amd64 hppa ppc ppc64 sparc x86
Comment 20 Thierry Carrez (RETIRED) gentoo-dev 2005-11-25 07:15:53 UTC
Thanks Wolfram.
Arches please test and mark stable...
Comment 21 Simon Stelling (RETIRED) gentoo-dev 2005-11-25 08:14:14 UTC
gnah, if i knew that there is an open security bug where 4.21.1 is affected too
i wouldn't have marked it stable yesterday. -r1 stable on amd64
Comment 22 Gustavo Zacarias (RETIRED) gentoo-dev 2005-11-25 09:27:56 UTC
sparc stable.
Comment 23 Chris White (RETIRED) gentoo-dev 2005-11-25 12:00:36 UTC
x86 stable.
Comment 24 Joe Jezak (RETIRED) gentoo-dev 2005-11-27 11:59:42 UTC
Marked ppc stable.
Comment 25 Thierry Carrez (RETIRED) gentoo-dev 2005-11-27 13:46:13 UTC
Ready for GLSA vote, I tend to vote yes.
Comment 26 Sune Kloppenborg Jeppesen (RETIRED) gentoo-dev 2005-11-27 13:57:19 UTC
A weak YES from me. 
Comment 27 Thierry Carrez (RETIRED) gentoo-dev 2005-11-29 02:37:17 UTC
Full yes and glsa-ed
Comment 28 Thierry Carrez (RETIRED) gentoo-dev 2005-11-29 02:42:16 UTC
Hm. Maybe we should wait for bug 113683 to be resolved ?
Comment 29 Thierry Carrez (RETIRED) gentoo-dev 2005-12-18 03:40:54 UTC
Both are ready now.
Comment 30 Thierry Carrez (RETIRED) gentoo-dev 2005-12-20 03:09:24 UTC
GLSA 200512-11