ca-certificates: drop expired "DST Root CA X3" #2653
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Let's encrypt signs current certificates based on their root certificate "ISRG Root X1". They provide two different versions of "ISRG Root X1", though. One is self-signed using "ISRG Root X1" and one is cross-signed using "DST Root CA X3" [1]. Some systems still distribute certificate chains with the cross-signed version. "DST Root CA X3" expired on 2021-09-30. This can lead to valid certificates being considered invalid on devices with the expired certificate still in their CA certificate bundle. Ubuntu[2] and RedHat[3][4] recently dropped this certificates from their `ca-certificates` packages for the same reasons. The blacklist code in certdata2pem is copied from the debian version of the file as it comes with ca-certificates_20210119.tar.xz. [1] https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021 [2] https://ubuntu.com/security/notices/USN-5089-1 [3] https://access.redhat.com/errata/RHBA-2021:3649 [4] https://access.redhat.com/articles/6338021
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Let's encrypt signs current certificates based on their root certificate "ISRG Root X1". They provide two different versions of "ISRG Root X1", though. One is self-signed using "ISRG Root X1" and one is cross-signed using "DST Root CA X3" [1]. Some systems still distribute certificate chains with the cross-signed version. "DST Root CA X3" expired on 2021-09-30. This can lead to valid certificates being considered invalid on devices with the expired certificate still in their CA certificate bundle. Ubuntu [2] and RedHat [3][4] recently dropped this certificate from their `ca-certificates` packages for the same reasons. We've also dropped this certificate from the MSYS2 package `ca-certificates` [5]. The blacklist code in certdata2pem is copied from the debian version of the file as it comes with ca-certificates_20210119.tar.xz. [1] https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021 [2] https://ubuntu.com/security/notices/USN-5089-1 [3] https://access.redhat.com/errata/RHBA-2021:3649 [4] https://access.redhat.com/articles/6338021 [5] msys2/MSYS2-packages#2653
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Let's encrypt signs current certificates based on their root
certificate "ISRG Root X1". They provide two different versions
of "ISRG Root X1", though. One is self-signed using "ISRG Root X1"
and one is cross-signed using "DST Root CA X3" [1]. Some systems
still distribute certificate chains with the cross-signed version.
"DST Root CA X3" expired on 2021-09-30. This can lead to valid
certificates being considered invalid on devices with the expired
certificate still in their CA certificate bundle.
Ubuntu[2] and RedHat[3][4] recently dropped this certificates from their
ca-certificatespackages for the same reasons.The blacklist code in certdata2pem is copied from the debian version
of the file as it comes with ca-certificates_20210119.tar.xz.
[1] https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021
[2] https://ubuntu.com/security/notices/USN-5089-1
[3] https://access.redhat.com/errata/RHBA-2021:3649
[4] https://access.redhat.com/articles/6338021