Pure-FTPd: Potential DoS when maximum connections is reached

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-ftp/pure-ftpd	<= 1.0.18	>= 1.0.18-r1	All supported architectures

Related bugreports: #54590

Pure-FTPd contains a bug potentially allowing a Denial of Service attack when the maximum number of connections is reached.

2. Impact Information

Pure-FTPd is a fast, production-quality and standards-compliant FTP server.

Pure-FTPd contains a bug in the accept_client function handling the setup of new connections.

When the maximum number of connections is reached an attacker could exploit this vulnerability to perform a Denial of Service attack.

3. Resolution Information

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version.

All Pure-FTPd users should upgrade to the latest stable version:

Code Listing 3.1: Resolution

# emerge sync

# emerge -pv ">=net-ftp/pure-ftpd-1.0.18-r1"
# emerge ">=net-ftp/pure-ftpd-1.0.18-r1"

4. References

Updated July 04, 2004

Summary: This is a Gentoo Linux Security Advisory

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