Denial of service in vsftpd - CVE-2011-0762

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service (DoS) attack.

The vulnerability exists due to an error in vsf_filename_passes_filter() function in ls.c file, when parsing glob expressions in STAT commands. A remote authenticated attacker can consume a large amount of CPU resources by creating multiple FTP sessions and sending specially crafted STAT commands.

Successful exploitation of the vulnerability may result in denial of service attack of entire system.

Affected software

How to mitigate CVE-2011-0762

Links to Public Exploits and PoC-codes

• Exploit #9084 - VSFTPD 2.3.2 Denial of Service (May 30, 2023)
• Exploit #388 - vsftpd 2.3.2 - Denial of Service (March 18, 2020)

External References

• http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=622741
• https://www.exploit-db.com/exploits/16270/

Related Security Bulletins

• Denial of service in vsftpd
• Ubuntu update for vsftpd
• Gentoo update for vsftpd
• Red Hat update for vsftpd