Executive Summary

Summary
Title stunnel4 security update
Informations
Name DSA-3299 First vendor Publication 2015-07-02
Vendor Debian Last vendor Modification 2015-07-02
Severity (Vendor) N/A Revision 1

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:P/I:P/A:N)
Cvss Base Score 5.8 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Johan Olofsson discovered an authentication bypass vulnerability in Stunnel, a program designed to work as an universal SSL tunnel for network daemons. When Stunnel in server mode is used with the redirect option and certificate-based authentication is enabled with "verify = 2" or higher, then only the initial connection is redirected to the hosts specified with "redirect". This allows a remote attacker to bypass authentication.

For the stable distribution (jessie), this problem has been fixed in version 3:5.06-2+deb8u1.

For the testing distribution (stretch), this problem has been fixed in version 3:5.18-1.

For the unstable distribution (sid), this problem has been fixed in version 3:5.18-1.

We recommend that you upgrade your stunnel4 packages.

Original Source

Url : http://www.debian.org/security/2015/dsa-3299

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-284 Access Control (Authorization) Issues

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 14

Information Assurance Vulnerability Management (IAVM)

Date Description
2015-05-21 IAVM : 2015-B-0063 - Stunnel Authentication Bypass Vulnerability
Severity : Category I - VMSKEY : V0060757

Nessus® Vulnerability Scanner

Date Description
2015-07-06 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3299.nasl - Type : ACT_GATHER_INFO
2015-06-16 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2015-1062-1.nasl - Type : ACT_GATHER_INFO
2015-05-20 Name : The remote Windows host contains a program that is affected by an authenticat...
File : stunnel_5_14.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2015-07-08 13:28:46
  • Multiple Updates
2015-07-02 21:29:32
  • First insertion