- ------------------------------------------------------------------------- Debian LTS Advisory DLA-2759-1 [email protected] https://www.debian.org/lts/security/ Sylvain Beucler September 17, 2021 https://wiki.debian.org/LTS - ------------------------------------------------------------------------- Package : gnutls28 Version : 3.5.8-5+deb9u6 Debian Bug : 961889 GnuTLS, a portable cryptography library, 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 3.5.8-5+deb9u6. We recommend that you upgrade your gnutls28 packages. For the detailed security status of gnutls28 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/gnutls28 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
Debian LTS: DLA-2759-1: gnutls28 alternate chains verification
September 17, 2021
GnuTLS, a portable cryptography library, fails to validate alternate trust chains in some conditions
Summary
For Debian 9 stretch, this problem has been fixed in version
3.5.8-5+deb9u6.
We recommend that you upgrade your gnutls28 packages.
For the detailed security status of gnutls28 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/gnutls28
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
Severity
Package : gnutls28
Version : 3.5.8-5+deb9u6
Debian Bug : 961889
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