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TITLE:
TorrentFlux Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA23270

VERIFY ADVISORY:
http://secunia.com/advisories/23270/

CRITICAL:
Moderately critical

IMPACT:
Cross Site Scripting, Exposure of system information, Exposure of
sensitive information, System access

WHERE:
>From remote

SOFTWARE:
TorrentFlux 2.x
http://secunia.com/product/12225/

DESCRIPTION:
Some vulnerabilities have been discovered in TorrentFlux, which can
be exploited by malicious users to gain system access or disclose
sensitive information and by malicious people to conduct cross-site
scripting attacks.

1) Input passed to the "announce" parameter in maketorrent.php is not
properly sanitised before being used as a part of a shell command.
This can be exploited to inject shell commands via the ";"
character.

Successful exploitation requires valid user credentials and that the
command to be executed doesn't contain certain characters, including
"<" or ">".

2) Input passed to the "torrent" parameter in startpop.php and
details.php is not properly sanitised before being used as a part of
a shell command. This can be exploited to inject shell commands by
using directory traversal attacks to refer to existing files and
directories containing backticks.

Successful exploitation requires valid user credentials, that "Enable
File Priority" is set to false (not the default), and that the
attacker can create files and directories containing backticks on the
web server (i.e. by uploading malicious torrent files or by local
shell access).

3) Input passed to the "alias" parameter in downloaddetails.php is
not properly sanitised before being used to display files. This can
be exploited to display most lines from arbitrary files via directory
traversal attacks.

Successful exploitation requires valid user credentials.

4) Input passed to the "dir" parameter in dir.php that is URL-encoded
twice is not properly sanitised before being returned to users. This
can be exploited to execute arbitrary HTML and script code in a
user's browser session in context of an affected site.

Successful exploitation requires that the target user is logged in.

The vulnerabilities are confirmed in version 2.2. Prior versions may
also be affected.

SOLUTION:
Update to version 2.3.

PROVIDED AND/OR DISCOVERED BY:
1+3) r0ut3r
2) Stefan Fritsch and Cameron Dale
4) Stefan Fritsch and an anonymous person

ORIGINAL ADVISORY:
1) http://www.milw0rm.com/exploits/2903
2+4) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=400582
3) http://www.milw0rm.com/exploits/2902

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
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