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 Ubuntu	=20.04
All of
ubuntu/stunnel4	<3:5.44-1ubuntu3+esm1	3:5.44-1ubuntu3+esm1
Ubuntu Ubuntu	=18.04

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Child vulnerabilities

(Contains the following vulnerabilities)

CVE-2021-20230

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

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