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Critical error in fudforum? [message #26822]

Tue, 16 August 2005 09:10

icarus

Messages: 52
Registered: May 2005

Karma: 0

Member

Hi!

I just searched the web for popular sites that use fud when I found the following: http://secunia.com/advisories/16414/

Zitat:

Alexander Heidenreich has discovered a vulnerability in FUDforum, which can be exploited by malicious people to bypass certain security restrictions.

Input passed to the "mid" parameter isn't properly validated before being used to retrieve a forum post. This can be exploited to view messages that are posted in private forums.

Successful exploitation requires that the "Tree View" feature is enabled.

The vulnerability has been confirmed in version 2.6.15. Other versions may also be affected.

Under http://packetstorm.linuxsecurity.com/0508-exploits/fudForum.txt you can find a patch for this bug.

Secunia declares this bug as: "Solution Status: Unpatched"

Bye!

Michael

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Re: Critical error in fudforum? [message #26823 is a reply to message #26822]

Tue, 16 August 2005 13:10

Ilia

Messages: 13241
Registered: January 2002

Karma: 0

Senior Member
Administrator
Core Developer

They are wrong, the patch posted in the report was taken directly out of FUDforum CVS and 2.7.0RC1 has the problem fixed.

FUDforum Core Developer

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Re: Critical error in fudforum? [message #26940 is a reply to message #26823]

Mon, 22 August 2005 15:25

AutoHost

Messages: 99
Registered: October 2002

Karma: 0

Member

Ilia,

Can you tell me if the following is correct, to patch this?

FudForum v2.3.5
tree.php.t
lines 111-122

        FROM
                {SQL_TABLE_PREFIX}msg
                LEFT JOIN {SQL_TABLE_PREFIX}users
                        ON {SQL_TABLE_PREFIX}msg.poster_id={SQL_TABLE_PREFIX}users.id
                LEFT JOIN {SQL_TABLE_PREFIX}avatar
                        ON {SQL_TABLE_PREFIX}users.avatar={SQL_TABLE_PREFIX}avatar.id
                INNER JOIN {SQL_TABLE_PREFIX}thread
                        ON {SQL_TABLE_PREFIX}msg.thread_id={SQL_TABLE_PREFIX}thread.id
                LEFT JOIN {SQL_TABLE_PREFIX}level
                        ON {SQL_TABLE_PREFIX}users.level_id={SQL_TABLE_PREFIX}level.id
        WHERE
                {SQL_TABLE_PREFIX}msg.id=".$mid." AND {SQL_TABLE_PREFIX}msg.approved='Y'");


replaced by

        FROM
                {SQL_TABLE_PREFIX}msg
                LEFT JOIN {SQL_TABLE_PREFIX}users
                        ON {SQL_TABLE_PREFIX}msg.poster_id={SQL_TABLE_PREFIX}users.id
                LEFT JOIN {SQL_TABLE_PREFIX}avatar
                        ON {SQL_TABLE_PREFIX}users.avatar={SQL_TABLE_PREFIX}avatar.id
                INNER JOIN {SQL_TABLE_PREFIX}thread
                        ON {SQL_TABLE_PREFIX}msg.thread_id={SQL_TABLE_PREFIX}thread.id
                LEFT JOIN {SQL_TABLE_PREFIX}level
                        ON {SQL_TABLE_PREFIX}users.level_id={SQL_TABLE_PREFIX}level.id
        WHERE
                {SQL_TABLE_PREFIX}msg.id=".$mid." AND {SQL_TABLE_PREFIX}msg.approved='Y' AND
                        SQL_TABLE_PREFIX}msg.thread_id=".$th"");

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Re: Critical error in fudforum? [message #26941 is a reply to message #26940]

Mon, 22 August 2005 16:14

Ilia

Messages: 13241
Registered: January 2002

Karma: 0

Senior Member
Administrator
Core Developer

Almost, it should be:

{SQL_TABLE_PREFIX}msg.id=".$mid." AND {SQL_TABLE_PREFIX}msg.approved='Y' AND
{SQL_TABLE_PREFIX}msg.thread_id=".$th);

FUDforum Core Developer

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Re: Critical error in fudforum? [message #26942 is a reply to message #26941]

Mon, 22 August 2005 19:23

AutoHost

Messages: 99
Registered: October 2002

Karma: 0

Member

Thank you.

Btw, I wanted to say that this is the only FudForum security problem I've seen mentioned in the security lists I've been on for several years.

Several other forum's software I see mentioned quite a bit.

Keep up the good work.

Ron Miller
Stars! AutoHost

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