What is the severity of USN-6901-1?

The severity of USN-6901-1 is considered high due to the potential for sensitive information exposure by remote attackers.

How do I fix USN-6901-1?

To fix USN-6901-1, update the stunnel4 package to either version 3:5.56-1ubuntu0.2 for Ubuntu 20.04 or 3:5.44-1ubuntu3+esm1 for Ubuntu 18.04.

What vulnerabilities does USN-6901-1 address?

USN-6901-1 addresses a vulnerability in stunnel related to improper validation of client certificates when using redirect and verifyChain options.

Who is affected by USN-6901-1?

USN-6901-1 affects users of stunnel4 on Ubuntu 20.04 and 18.04 who have configured both the redirect and verifyChain options.

What is the risk of not addressing USN-6901-1?

Not addressing USN-6901-1 may allow remote attackers to exploit the vulnerability and obtain sensitive information through the tunneled service.

Vulnerability/
USN-6901-1

18/7/2024

USN-6901-1: stunnel vulnerability

First published: Thu Jul 18 2024(Updated: )

It was discovered that stunnel did not properly validate client certificates when configured to use both the redirect and verifyChain options. A remote attacker could potentially use this issue to obtain sensitive information by accessing the tunneled service.

Affected Software	Affected Version	How to fix
All of
ubuntu/stunnel4	<3:5.56-1ubuntu0.2	3:5.56-1ubuntu0.2
Ubuntu Linux	=20.04
All of
ubuntu/stunnel4	<3:5.44-1ubuntu3+esm1	3:5.44-1ubuntu3+esm1
Ubuntu Linux	=18.04

Never miss a vulnerability like this again

Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

CVE-2021-20230

Frequently Asked Questions

What is the severity of USN-6901-1?
The severity of USN-6901-1 is considered high due to the potential for sensitive information exposure by remote attackers.
How do I fix USN-6901-1?
To fix USN-6901-1, update the stunnel4 package to either version 3:5.56-1ubuntu0.2 for Ubuntu 20.04 or 3:5.44-1ubuntu3+esm1 for Ubuntu 18.04.
What vulnerabilities does USN-6901-1 address?
USN-6901-1 addresses a vulnerability in stunnel related to improper validation of client certificates when using redirect and verifyChain options.
Who is affected by USN-6901-1?
USN-6901-1 affects users of stunnel4 on Ubuntu 20.04 and 18.04 who have configured both the redirect and verifyChain options.
What is the risk of not addressing USN-6901-1?
Not addressing USN-6901-1 may allow remote attackers to exploit the vulnerability and obtain sensitive information through the tunneled service.

agent/severity
agent/title
agent/last-modified-date
agent/softwarecombine
agent/references
agent/description
agent/event
agent/first-publish-date
agent/type
agent/trending
agent/source
agent/tags
collector/usn
source/Ubuntu
agent/software-canonical-lookup
agent/software-canonical-lookup-request
package-manager/ubuntu
vendor/ubuntu
canonical/ubuntu linux
version/ubuntu linux/20.04
version/ubuntu linux/18.04

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.

Frequently Asked Questions

What is the severity of USN-6901-1?
The severity of USN-6901-1 is considered high due to the potential for sensitive information exposure by remote attackers.
How do I fix USN-6901-1?
To fix USN-6901-1, update the stunnel4 package to either version 3:5.56-1ubuntu0.2 for Ubuntu 20.04 or 3:5.44-1ubuntu3+esm1 for Ubuntu 18.04.
What vulnerabilities does USN-6901-1 address?
USN-6901-1 addresses a vulnerability in stunnel related to improper validation of client certificates when using redirect and verifyChain options.
Who is affected by USN-6901-1?
USN-6901-1 affects users of stunnel4 on Ubuntu 20.04 and 18.04 who have configured both the redirect and verifyChain options.
What is the risk of not addressing USN-6901-1?
Not addressing USN-6901-1 may allow remote attackers to exploit the vulnerability and obtain sensitive information through the tunneled service.