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Error in the certificate verification

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Jörg-Volker Peetz

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Oct 2, 2021, 8:00:04 AM10/2/21
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Hi,

on Debian testing, when trying to update package lists with `apt update`, the
following error message show up:

W: Failed to fetch https://deb.debian.org/debian/dists/testing/InRelease
Certificate verification failed: The certificate is NOT trusted. The certificate
chain uses expired certificate. Could not handshake: Error in the certificate
verification. [IP: 199.232.138.132 443]

The IP address varies between different calls.
Has anybody else encountered this problem?

Gpg tells that the signature of `InRelease` is made
using RSA key 0146DC6D4A0B2914BDED34DB648ACFD622F3D138
and
using RSA key A7236886F3CCCAAD148A27F80E98404D386FA1D9

Any idea anybody?

Regards,
Jörg.

Jörg-Volker Peetz

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Oct 2, 2021, 9:40:04 AM10/2/21
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Solution was to

sudo dpkg-reconfigure ca-certificates

and trust the certificate `ISRG_Root_X1.crt`. I read about it here:

https://scotthelme.co.uk/lets-encrypt-old-root-expiration/

Regards,
Jörg.
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