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[Dimitri John Ledkov <1928648@xxxxxxxxxxxxxxxxxx>]

*** This bug is a security vulnerability ***

Public security bug reported:

https://community.letsencrypt.org/t/openssl-client-compatibility-
changes-for-let-s-encrypt-certificates/143816

Currently gnutls28 in bionic and earlier will not establish a
connection, if any parts of the trust chain have expired, even though
alternative non-expired chains are available.

This has been fixed in GnuTLS 3.6.14, but probably should be backported
to bionic and earlier if it was not already been done so.

https://gitlab.com/gnutls/gnutls/-/issues/1008

https://gitlab.com/gnutls/gnutls/-/merge_requests/1271

** Affects: gnutls28 (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: gnutls28 (Ubuntu Precise)
     Importance: Undecided
         Status: New

** Affects: gnutls28 (Ubuntu Trusty)
     Importance: Undecided
         Status: New

** Affects: gnutls28 (Ubuntu Xenial)
     Importance: Undecided
         Status: New

** Affects: gnutls28 (Ubuntu Bionic)
     Importance: Undecided
         Status: New

** Also affects: gnutls28 (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: gnutls28 (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: gnutls28 (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: gnutls28 (Ubuntu Precise)
   Importance: Undecided
       Status: New

** Changed in: gnutls28 (Ubuntu)
       Status: New => Fix Released

** Information type changed from Public to Public Security

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https://bugs.launchpad.net/bugs/1928648

Title:
  expiring trust anchor compatibility issue

Status in gnutls28 package in Ubuntu:
  Fix Released
Status in gnutls28 source package in Precise:
  New
Status in gnutls28 source package in Trusty:
  New
Status in gnutls28 source package in Xenial:
  New
Status in gnutls28 source package in Bionic:
  New

Bug description:
  https://community.letsencrypt.org/t/openssl-client-compatibility-
  changes-for-let-s-encrypt-certificates/143816

  Currently gnutls28 in bionic and earlier will not establish a
  connection, if any parts of the trust chain have expired, even though
  alternative non-expired chains are available.

  This has been fixed in GnuTLS 3.6.14, but probably should be
  backported to bionic and earlier if it was not already been done so.

  https://gitlab.com/gnutls/gnutls/-/issues/1008

  https://gitlab.com/gnutls/gnutls/-/merge_requests/1271

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