I have released version 5.34 of stunnel.
This release includes a major security bugfix.
The ChangeLog entry:
Version 5.34, 2016.07.05, urgency: HIGH
* Security bugfixes
- Fixed malfunctioning "verify = 4".
* New features
- Bind sockets with SO_EXCLUSIVEADDRUSE on WIN32.
- Added three new service-level options: requireCert, verifyChain,
and verifyPeer for fine-grained certificate verification control.
- Improved compatibility with the current OpenSSL 1.1.0-dev tree.