Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2021.3144
openssl1.0 security update
20 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: openssl1.0
Publisher: Debian
Operating System: Debian GNU/Linux
Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Unknown/Unspecified
Resolution: Patch/Upgrade
Original Bulletin:
https://www.debian.org/lts/security/2021/dla-2761
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running openssl1.0 check for an updated version of the software for
their operating system.
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Debian LTS Advisory DLA-2761-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Sylvain Beucler
September 18, 2021 https://wiki.debian.org/LTS
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Package : openssl1.0
Version : 1.0.2u-1~deb9u5
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
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