Debian DSA-3299-1 : stunnel4 - security update

medium Nessus Plugin ID 84509

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Synopsis

The remote Debian host is missing a security-related update.

Description

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.

Solution

Upgrade the stunnel4 packages.

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

Plugin Details

Severity: Medium

ID: 84509

File Name: debian_DSA-3299.nasl

Version: 2.10

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 7/6/2015

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:8.0, p-cpe:/a:debian:debian_linux:stunnel4

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/2/2015

Reference Information

CVE: CVE-2015-3644

BID: 74659

DSA: 3299

IAVB: 2015-B-0063

Detections

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