Debian Security Advisory
DLA-2761-1 openssl1.0 -- LTS security update
- Date Reported:
- 18 Sep 2021
- Affected Packages:
- Security database references:
- No other external database security references currently available.
- More information:
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