Vulnerability Overview
The attacker inserted a backdoor into the vsf_secutil.c and main.c files. This backdoor allowed remote attackers to bypass authentication and gain a root shell. vsftpd 208 exploit github fix
# Disable anonymous uploads
anonymous_enable=NO
- https://github.com/pierrepy/vsftpd-2.3.4-patches
For manual compilation (from trusted source):
wget https://security.appspot.com/downloads/vsftpd-3.0.5.tar.gz
tar -xzf vsftpd-3.0.5.tar.gz
cd vsftpd-3.0.5
make
sudo make install
If you are auditing a legacy codebase on GitHub, ensure the file str.c does not contain the following malicious code snippet: Vulnerability Overview The attacker inserted a backdoor into
Step 5: Harden Configuration
Even with a patched version, FTP is inherently risky. Implement these changes in /etc/vsftpd.conf: https://github
Understanding the Exploit (CVE-2011-2523)
The vsftpd 2.0.8 exploit is a remote code execution vulnerability that occurs when vsftpd is configured to use a chroot() jail. An attacker can exploit this vulnerability by sending a crafted FTP command, which allows them to escape the chroot() jail and execute arbitrary code on the server.