stunnel 4.46 < 5.34 Improper Level 4 Peer Certificate Validation Security Bypass

This script is Copyright (C) 2016 Tenable Network Security, Inc.

Synopsis :

An application installed on the remote host is affected by a
security bypass vulnerability.

Description :

The version of stunnel installed on the remote host is 4.46 or later
but prior to 5.34. It is, therefore, affected by a security bypass
vulnerability related to the validation of level 4 peer certificates.
An unauthenticated, remote attacker can exploit this to have an impact
on confidentiality, integrity, and/or availability. No other details
are available.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.

See also :

Solution :

Upgrade to stunnel version 5.34 or later.

Risk factor :

Critical / CVSS Base Score : 10.0
CVSS Temporal Score : 7.4
Public Exploit Available : false

Family: Windows

Nessus Plugin ID: 92557 ()

Bugtraq ID:


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