Vulnerability Assessment & Network Security Forums



If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Red Hat Local Security Checks >> RHSA-2003-223: stunnel


Vulnerability Assessment Details

RHSA-2003-223: stunnel

Vulnerability Assessment Summary
Check for the version of the stunnel packages

Detailed Explanation for this Vulnerability Assessment


Updated stunnel packages are now available. These updates correct a
potential vulnerability in stunnel's signal handling.

Stunnel is a wrapper for network connections. It can be used to tunnel an
unencrypted network connection over a secure connection (encrypted using
SSL or TLS) or to provide a secure means of connecting to services that do
not natively support encryption.

When configured to listen for incoming connections (instead of being
invoked by xinetd), stunnel can be configured to either start a thread or a
child process to handle each new connection. If Stunnel is configured to
start a new child process to handle each connection, it will receive a
SIGCHLD signal when that child exits.

Stunnel versions prior to 4.04 would perform tasks in the SIGCHLD signal
handler which, if interrupted by another SIGCHLD signal, could be unsafe.
This could lead to a denial of service.

All users are urged to upgrade to these errata packages, which modify
stunnel's signal handler so that it is not vulnerable to this issue.

NOTE: After upgrading, any instances of stunnel configured to run in daemon
mode should be restarted, and any active network connections that are
currently being serviced by stunnel should be terminated and reestablished.




Solution : http://rhn.redhat.com/errata/RHSA-2003-223.html
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security

Cables, Connectors

IBM SYSTEM X3250 M5 SERVER 24GB NO HDD 1
$1179.0
IBM SYSTEM X3250 M5 SERVER 24GB NO HDD 1 pictureIBM SYSTEM X3650 M3 8B SERVER TWO E5640 2.66GHZ 16GB NO HDD
$819.0
IBM SYSTEM X3650 M3 8B SERVER TWO E5640 2.66GHZ 16GB NO HDD pictureIBM SYSTEM X3550 M3 SERVER TWO E5520 2.26GHZ 96GB 2 X 250GB SATA
$829.0
IBM SYSTEM X3550 M3 SERVER TWO E5520 2.26GHZ 96GB 2 X 250GB SATA pictureIBM SYSTEM X3550 M3 SERVER TWO E5640 2.66GHZ 48GB 4 X 1.2TB 10K SAS
$1919.0
IBM SYSTEM X3550 M3 SERVER TWO E5640 2.66GHZ 48GB 4 X 1.2TB 10K SAS picture


Discussions

No Discussions have been posted on this vulnerability.