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Debian DLA-2761-1 : openssl1.0 - LTS security update

high Nessus Plugin ID 153481

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Synopsis

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

Description

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2761 advisory.

 The legacy 1.0 version of OpenSSL, a cryptography library for secure communication, fails to validate alternate trust chains in some conditions. In particular this breaks connecting to servers that use Let's Encrypt certificates, starting 2021-10-01. For Debian 9 stretch, this problem has been fixed in version 1.0.2u-1~deb9u5. We recommend that you upgrade your openssl1.0 packages. For the detailed security status of openssl1.0 please refer to its security tracker page at: https://security- tracker.debian.org/tracker/openssl1.0 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at:
 https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

Solution

Upgrade the openssl1.0 packages.

For Debian 9 stretch, this problem has been fixed in version 1.0.2u-1~deb9u5.

See Also

https://security-tracker.debian.org/tracker/source-package/openssl1.0

https://packages.debian.org/source/stretch/openssl1.0

https://www.debian.org/lts/security/2021/dla-2761

Plugin Details

Severity: High

ID: 153481

File Name: debian_DLA-2761.nasl

Version: 1.3

Type: local

Agent: unix

Published: 9/19/2021

Updated: 1/24/2025

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:libssl1.0-dev, p-cpe:/a:debian:debian_linux:libssl1.0.2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/18/2021

Vulnerability Publication Date: 9/18/2021