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

2008-01-3000:00:00

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Gentoo Linux Security Advisory GLSA 200801-17

                                        http://security.gentoo.org/

Severity: Normal
Title: Netkit FTP Server: Denial of Service
Date: January 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
-------------------------------------------------------------------

1 net-ftp/netkit-ftpd < 0.17-r7 >= 0.17-r7

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 &quot;&gt;=net-ftp/netkit-ftpd-0.17-r7&quot;

References

[ 1 ] CVE-2007-6263
http://cve.mitre.org/cgi-bin/cvename.cgi?name=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
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.