[SECURITY] [DLA 2759-1] gnutls28 alternate chains verification
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Debian LTS Advisory DLA-2759-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Sylvain Beucler
September 17, 2021 https://wiki.debian.org/LTS
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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
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