# # This script was written by Drew Hintz ( http://guh.nu ) # # It is based on scripts written by Renaud Deraison and HD Moore # # See the Nessus Scripts License for details # if(description) { script_id(10811); script_bugtraq_id(3526); script_version ("$Revision: 1.15 $"); script_cve_id("CVE-2001-0815"); name["english"] = "ActivePerl perlIS.dll Buffer Overflow"; script_name(english:name["english"]); desc["english"] = " An attacker can run arbitrary code on the remote computer. This is because the remote IIS server is running a version of ActivePerl prior to 5.6.1.630 and has the Check that file exists option disabled for the perlIS.dll. Solution: Either upgrade to a version of ActivePerl more recent than 5.6.1.629 or enable the Check that file exists option. To enable this option, open up the IIS MMC, right click on a (virtual) directory in your web server, choose Properties, click on the Configuration... button, highlight the .plx item, click Edit, and then check Check that file exists. More Information: http://www.securityfocus.com/bid/3526 Risk factor : High"; script_description(english:desc["english"]); summary["english"] = "Determines if arbitrary commands can be executed thanks to ActivePerl's perlIS.dll"; script_summary(english:summary["english"]); script_category(ACT_DESTRUCTIVE_ATTACK); script_copyright(english:"This script is Copyright (C) 2001 H D Moore & Drew Hintz ( http://guh.nu )"); family["english"] = "CGI abuses"; script_family(english:family["english"]); script_dependencie("find_service.nes", "http_version.nasl", "www_fingerprinting_hmap.nasl"); script_require_ports("Services/www", 80); exit(0); } include("http_func.inc"); include("http_keepalive.inc"); port = get_http_port(default:80); if(!get_port_state(port))exit(0); sig = get_kb_item("www/hmap/" + port + "/description"); if ( sig && "IIS" >!< sig ) exit(0); function check(req) { req = http_get(item:req, port:port); r = http_keepalive_send_recv(port:port, data:req); if(r == NULL)exit(0); if ("HTTP/1.1 500 Server Error" >< r && ("The remote procedure call failed." >< r || "Error" >< r)) { security_hole(port:port); return(1); } return(0); } dir[0] = "/scripts/"; dir[1] = "/cgi-bin/"; dir[2] = "/"; for(d = 0; dir[d]; d = d + 1) { url = string(dir[d], crap(660), ".plx"); #by default perlIS.dll handles .plx if(check(req:url))exit(0); url = string(dir[d], crap(660), ".pl"); if(check(req:url))exit(0); }