CVE-2007-6741 Improper privilege management in pyftpdlib

Medium 6.5 Published 19 Oct 2010 Updated 16 Sep 2024

Authenticated users can bypass FTP bounce restrictions to connect to privileged ports, potentially attacking internal hosts via NAT.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2007-6741?

CVE-2007-6741 is a medium-severity vulnerability in n/a, published on 19 Oct 2010. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The ftp_PORT function in FTPServer.py in pyftpdlib before 0.2.0 does not prevent TCP connections to privileged ports if the destination IP address matches the source IP address of the connection from the FTP client, which might allow remote authenticated users to conduct FTP bounce attacks via crafted FTP data, as demonstrated by an FTP bounce attack against a NAT server, a related issue to CVE-1999-0017.

Weakness: CWE-264

Which versions are affected by CVE-2007-6741?

3 open source packages ship an affected version, including pyftpdlib. It affects 1 product.

Package	Affected	Fixed in
`pyftpdlib` PyPI	All versions	`0.2.0`
`pyftpdlib` PyPI	All versions	`0.2.0`
`pyftpdlib` PyPI	All versions	`0.2.0`

Products include G.rodola Pyftpdlib.

How do I fix CVE-2007-6741?

Upgrade pyftpdlib to 0.2.0 or later.

Is CVE-2007-6741 being exploited?

There is no known exploitation of CVE-2007-6741 in the wild and no public exploit code.

Sources

Also known as GHSA-8xgx-75qw-6268, PYSEC-2010-25.