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vBulletin 3.x and 4.x Redirect Security Exploit

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  • Wayne Luke
    replied
    This thread is simply too long and too convoluted to provide individual support at this time. If you have an issue that you feel is caused by this or a similar problem, please open your own thread. It is a lot easier to handle support in individual threads instead of large convoluted threads that are a year old.

    Leave a comment:


  • Zachery
    replied
    Mikesite, that is not the vbcms. That is vBadvanced.

    Leave a comment:


  • MikesSite
    replied
    For anyone using vBCMS that is having this issue, check this out http://www.vbadvanced.com/forum/showthread.php?t=44720

    Leave a comment:


  • Trevor Hannant
    replied
    To check a site for compromises follow these steps:

    1) Run Suspect File Diagnostics under Maintenance -> Diagnostics. Replace any files not containing the expected contents. Delete any files that are not part of vBulletin and that you can't identify as belonging to your addons.

    2) Check the config.php for any suspicious code. It isn't checked by the suspect file diagnostic.

    3) Search all templates for iframe tags. They should only appear in the following templates: bbcode_video, editor-ie.css, member.css, stylegenerator.css, vbcms.css, vbulletin.css, help_bbcodes, humanverify_recaptcha, search_common, and search_common_select_type

    4) Check all your plugins for rogue include, require, include_once, or require_once code. All files should come from your server and be known to you. See step #7

    5) Check your plugins for any base64 code. I recommend using against using any plugins or products that include base64 code in them. However some "lite" or branded addons will include this as a means to prevent you from cheating the author. You'll have to make a personal call on these if you use them. This is often a sign of a hacked site.

    6) Make sure that your plugins do not include calls to exec(), system(), or pass_thru() or iframes. These are also often signs of a hacked site.

    The following query can be run in phpMyAdmin and will provide results for steps 5 and 6 -
    SELECT title, phpcode, hookname, product FROM plugin WHERE phpcode LIKE '%base64%' OR phpcode LIKE '%exec%' OR phpcode LIKE '%system%' OR phpcode like '%pass_thru%' OR phpcode like '%iframe%';

    If you a plugin that you can't read or the code is obfuscated then you should probably contact the addon author. If it is assigned to the vBulletin, vBulletin CMS, vBulletin Blog or Skimlink products, delete it.

    7) Using PHPMyAdmin run this query: SELECT styleid, title, template FROM template WHERE template LIKE '%base64%' OR template LIKE '%exec%' OR template LIKE '%system%' OR template like '%pass_thru%' OR template like '%iframe%';

    It checks the templates for compromising code. You will need to review the results from this. If you can't read it or the code is obfuscated then you should revert the template in the Admin CP.

    8) Check .htaccess to make sure there are no redirects there.

    9) Check all plugins in reference to cache or cookies. If they are similar to any of the above, delete them.

    Leave a comment:


  • FourTwenty
    replied
    How do we test to see if we are effected?

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  • niteflyer32
    replied
    The Remote YUI is set to Google.

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  • Trevor Hannant
    replied
    Are you still using the Remote YUI or has it reverted back?

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  • niteflyer32
    replied
    We upgraded to 4.1.5 from 4.1.1 and have the Google myfilestore.com redirect. I don't see any funny files on the server. We set the User Remote YUI to Google before the upgrade and that appeared to fix the issue. Now after the upgrade we seem to have the exploit again.

    We are not running vbSEO

    Leave a comment:


  • Lee G
    replied
    I found that the forum display edit was something to do with me.
    Found that one edited on my hard drive.
    Had a hard drive take a permanent vacation since that happened.

    The strange thing with the other two files, they were only found on the forums and none of the other websites I own
    Files similar to those would have been in other locations, local websites etc
    Looking at the wording, they look like some kind of hacker tag
    Google, Yahoo and Microsoft are all easy to see who they are for
    Im watching my error logs to see if any hits do show for those files

    The good news on the remote database access on localhost, it has not come back in two weeks
    Last edited by Lee G; Sat 6th Aug '11, 5:49am.

    Leave a comment:


  • Joe D.
    replied
    Originally posted by Lee G View Post
    Im going deeper and deeper into the files now

    Found two html files on the server which I cant find any mention of on the net

    PHP Code:
    Phrase"# when back again awoke it came the sounds i and rainedslowly"
    File"ydnGKPFcq.html"
    Url to Check"http://www.thespainforum.com/ydnGKPFcq.html" 
    That file was called ydnGKPFcq.html

    And

    PHP Code:
    Phrase"# spirits but of troop blest a"
    File"ydnA6MIKw.html"
    Url to Check"http://www.thespainforum.com/ydnA6MIKw.html" 
    File called ydnA6MIKw.html

    Both files have been on the server for over year
    12 ‎December ‎2008, ‏‎19:46:24
    ‎07 ‎February ‎2009, ‏‎23:23:20
    It is possible those are files used to confirm you owned your website... sites like Google Webmaster Tools, Alexa, and others require a webmaster to upload files like that to prove ownership. While I haven't seen this specific format of file before, it was the first thing that came to mind when I saw what you posted. Are you sure you didn't upload such files to "prove" ownership in the past? Is there anyone else with FTP access who may have had reason to do so?

    Leave a comment:


  • Lee G
    replied
    It gets better. I have now found a forumdisplay.php file which has April last year as its date
    April last year I had a definite redirect in place
    If there had been need to edit it for a mod, there would normally be a note in there
    Just uploaded the original
    I run the file checker on vb and it never picked up that file
    I dont think any mods from the org have ever required that file to be edited in any way
    I have a copy of the file if anyone wants to look it over
    Looks like another password change is on the way

    Leave a comment:


  • djbaxter
    replied
    If this were me, I would:

    1. delete those files immediately; and

    2. change all my server and FTP and database passwords.

    Leave a comment:


  • Lee G
    replied
    Im going deeper and deeper into the files now

    Found two html files on the server which I cant find any mention of on the net

    PHP Code:
    Phrase"# when back again awoke it came the sounds i and rainedslowly"
    File"ydnGKPFcq.html"
    Url to Check"http://www.thespainforum.com/ydnGKPFcq.html" 
    That file was called ydnGKPFcq.html

    And

    PHP Code:
    Phrase"# spirits but of troop blest a"
    File"ydnA6MIKw.html"
    Url to Check"http://www.thespainforum.com/ydnA6MIKw.html" 
    File called ydnA6MIKw.html

    Both files have been on the server for over year
    12 ‎December ‎2008, ‏‎19:46:24
    ‎07 ‎February ‎2009, ‏‎23:23:20

    Leave a comment:


  • Lee G
    replied
    Posted before checking my hard drive, there was a pol1 release with the file in it

    Leave a comment:


  • Joe D.
    replied
    Envolve uses base64 encoding to encode usernames, that's why it set off the check 4 hack mod.

    Leave a comment:

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