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AUSCERT External Security Bulletin Redistribution
ESB-2021.0271
Security update for stunnel
25 January 2021
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AusCERT Security Bulletin Summary
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Product: stunnel
Publisher: SUSE
Operating System: SUSE
Impact/Access: Reduced Security -- Existing Account
Resolution: Patch/Upgrade
Original Bulletin:
https://www.suse.com/support/update/announcement/2021/suse-su-20210194-1
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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.
Description:
This update for stunnel fixes the following issues:
Security issue fixed:
o The "redirect" option was fixed to properly handle "verifyChain = yes" (bsc
#1177580).
Non-security issues fixed:
o Fix startup problem of the stunnel daemon (bsc#1178533)
o 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.
o 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 Mikhalitsyn). - 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.
o 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.
o enable /etc/stunnel/conf.d
o 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:
o 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:
o SUSE Linux Enterprise Module for Server Applications 15-SP2 (aarch64
ppc64le s390x x86_64):
stunnel-5.57-3.5.1
stunnel-debuginfo-5.57-3.5.1
stunnel-debugsource-5.57-3.5.1
References:
o https://bugzilla.suse.com/1177580
o https://bugzilla.suse.com/1178533
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