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Conectiva Linux Security Announcement - stunnel

Dec 21, 2000, 00:48 (0 Talkback[s])

Date: Wed, 20 Dec 2000 12:25:50 -0200
From: secure@CONECTIVA.COM.BR
To: BUGTRAQ@SECURITYFOCUS.COM
Subject: [CLA-2000:363] Conectiva Linux Security Announcement - stunnel


CONECTIVA LINUX SECURITY ANNOUNCEMENT


PACKAGE   : stunnel
SUMMARY   : Remote exploit and other bug fixes
DATE      : 2000-12-20 12:18:00
ID        : CLA-2000:363
RELEVANT
RELEASES  : 4.0, 4.0es, 4.1, 4.2, 5.0, 5.1, 6.0

DESCRIPTION "stunnel" is a package which offers wrapped SSL connections for generic TCP services, such as pop3, ldap and others. Versions prior to 3.9 have a format string vulnerability in a syslog() call which could be exploited remotely. The package distributed with Conectiva Linux 5.1 and 6.0 has the daemon running as the "stunnel" user, and not root, which diminishes the effect of this vulnerability somewhat. Also, versions prior to 3.8 created the PID file in an insecure manner, possibly making it vulnerable to symlink attacks depending on where the user chose to put the PID file. Other bugs were also fixed in the 3.10 release, please refer to the Changelog for a full description.

SOLUTION
All stunnel users should upgrade immediatelly.

DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/4.0/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.0/i386/stunnel-3.10-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.0es/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.0es/i386/stunnel-3.10-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.1/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.1/i386/stunnel-3.10-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.2/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.2/i386/stunnel-3.10-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/stunnel-3.10-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/stunnel-3.10-1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/stunnel-3.10-1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/stunnel-3.10-1cl.i386.rpm

ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform upgrades:
- add the following line to /etc/apt/sources.list if it is not there yet (you may also use linuxconf to do this):

rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

 - run:                 apt-get update
 - after that, execute: apt-get upgrade
Detailed instructions reagarding the use of apt and upgrade examples can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

All packages are signed with Conectiva's GPG key. The key can be obtained at http://www.conectiva.com.br/contato