GLSA 200801-17: Netkit FTP Server: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Netkit FTP Server: Denial of Service
Date:	01/29/2008
Bugs:	#199206
ID:	200801-17

Synopsis

Netkit FTP Server contains a Denial of Service vulnerability.

Background

net-ftp/netkit-ftpd is the Linux Netkit FTP server with optional SSL support.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-ftp/netkit-ftpd	< 0.17-r7	>= 0.17-r7	All supported architectures

Description

Venustech AD-LAB discovered that an FTP client connected to a vulnerable server with passive mode and SSL support can trigger an fclose() function call on an uninitialized stream in ftpd.c.

Impact

A remote attacker can send specially crafted FTP data to a server with passive mode and SSL support, causing the ftpd daemon to crash.

Workaround

Disable passive mode or SSL.

Resolution

All Netkit FTP Server users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-ftp/netkit-ftpd-0.17-r7"

References

CVE-2007-6263

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200801-17.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.