SUSE-SU-2021:0194-1: moderate: Security update for stunnel

sle-updates at sle-updates at
Fri Jan 22 10:16:19 MST 2021

   SUSE Security Update: Security update for stunnel

Announcement ID:    SUSE-SU-2021:0194-1
Rating:             moderate
References:         #1177580 #1178533 
Affected Products:
                    SUSE Linux Enterprise Module for Server Applications 15-SP2

   An update that contains security fixes can now be installed.


   This update for stunnel fixes the following issues:

   Security issue fixed:

   - The "redirect" option was fixed to properly handle "verifyChain = yes"

   Non-security issues fixed:

   - Fix startup problem of the stunnel daemon (bsc#1178533)

   - update to 5.57:
     * Security bugfixes
     * New features
       - New securityLevel configuration file option.
       - Support for modern PostgreSQL clients
       - TLS 1.3 configuration updated for better compatibility.
     * Bugfixes
       - Fixed a transfer() loop bug.
       - Fixed memory leaks on configuration reloading errors.
       - DH/ECDH initialization restored for client sections.
       - Delay startup with systemd until network is online.
       - A number of testing framework fixes and improvements.

   - update to 5.56:
     - Various text files converted to Markdown format.
     - Support for realpath(3) implementations incompatible with
       POSIX.1-2008, such as 4.4BSD or Solaris.
     - Support for engines without PRNG seeding methods (thx to Petr
     - Retry unsuccessful port binding on configuration file reload.
     - Thread safety fixes in SSL_SESSION object handling.
     - Terminate clients on exit in the FORK threading model.

   - Fixup stunnel.conf handling:
     * Remove old static openSUSE provided stunnel.conf.
     * Use upstream stunnel.conf and tailor it for openSUSE using sed.
     * Don't show README.openSUSE when installing.

   - enable /etc/stunnel/conf.d
   - re-enable openssl.cnf

Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Module for Server Applications 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP2-2021-194=1

Package List:

   - SUSE Linux Enterprise Module for Server Applications 15-SP2 (aarch64 ppc64le s390x x86_64):



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