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CVE-2023-43121: Extreme Networks EXOS Unauthenticated File Read

Information

Description: A directory traversal vulnerability in the Chalet application in EXOS allows any file on the system to be read.
Versions Affected: 32.1.1.6
Version Fixed: See the vendors advisory
Researcher: David Yesland (https://twitter.com/daveysec)
Disclosure Link: https://rhinosecuritylabs.com/research/extreme-networks-extremexos-vulnerabilities
Advisory: https://extreme-networks.my.site.com/ExtrArticleDetail?an=000114376

Proof-of-Concept Exploit

Description

A directory traversal vulnerability allows any file on the system to be retreived. Including the system config file containing the user password hashes.

Usage/Exploitation

usage: CVE-2023-43121.py [-h] [-f FILE] -t TARGET [-o OUTPUT] [--hashes]

optional arguments:
  -h, --help            show this help message and exit
  -f FILE, --file FILE  File to read
  -t TARGET, --target TARGET
                        EXOS Target (http://<ip>)
  -o OUTPUT, --output OUTPUT
                        Output file to write contents to
  --hashes              Just get the user hashes from the device

Screenshot

file read