[Bug 2028170] Re: curl 7.81.0-1ubuntu1.11 fails verifying proper ssl cert w/ subj-alt-name

[Loren Underwood]

Thanks for response. Requested output from system with bug (DEV) below:

ubuntu at t1:~$ sudo dpkg -l | grep curl
ii  curl                               7.81.0-1ubuntu1.13                                                   amd64        command line tool for transferring data with URL syntax
ii  libcurl3-gnutls:amd64              7.81.0-1ubuntu1.13                                                   amd64        easy-to-use client-side URL transfer library (GnuTLS flavour)
ii  libcurl4:amd64                     7.81.0-1ubuntu1.13                                                   amd64        easy-to-use client-side URL transfer library (OpenSSL flavour)
ii  php7.3-curl                        7.3.33-8+ubuntu20.04.1+deb.sury.org+1                                amd64        CURL module for PHP
ii  php7.4-curl                        1:7.4.33-1+ubuntu20.04.1+deb.sury.org+1                              amd64        CURL module for PHP
ii  php8.0-curl                        1:8.0.26-1+ubuntu20.04.1+deb.sury.org+1                              amd64        CURL module for PHP
ii  php8.1-curl                        8.1.2-1ubuntu2.13                                                    amd64        CURL module for PHP
ii  php8.2-curl                        8.2.0-3+ubuntu20.04.1+deb.sury.org+1                                 amd64        CURL module for PHP
ubuntu at t1:~$

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Title:
  curl 7.81.0-1ubuntu1.11 fails verifying proper ssl cert w/ subj-alt-
  name

Status in curl package in Ubuntu:
  Invalid
Status in curl source package in Focal:
  Invalid
Status in curl source package in Jammy:
  Fix Released
Status in curl source package in Kinetic:
  Invalid
Status in curl source package in Lunar:
  Invalid
Status in curl source package in Mantic:
  Invalid

Bug description:
  With the latest curl 7.81.0-1ubuntu1.11 on ubuntu 22.04, I'm getting
  the following:

  curl -v https://raw.githubusercontent.com

  *   Trying 185.199.108.133:443...
  * Connected to raw.githubusercontent.com (185.199.108.133) port 443 (#0)
  [...]
  * SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
  * ALPN, server accepted to use h2
  * Server certificate:
  *  subject: C=US; ST=California; L=San Francisco; O=GitHub, Inc.; CN=*.github.io
  *  start date: Feb 21 00:00:00 2023 GMT
  *  expire date: Mar 20 23:59:59 2024 GMT
  *  subjectAltName does not match raw.githubusercontent.com
  * SSL: no alternative certificate subject name matches target host name 'raw.githubusercontent.com'
  curl: (60) SSL: no alternative certificate subject name matches target host name 'raw.githubusercontent.com'
  More details here: https://curl.se/docs/sslcerts.html

  curl failed to verify the legitimacy of the server and therefore could not
  establish a secure connection to it. To learn more about this situation and
  how to fix it, please visit the web page mentioned above.

  --
  The alt name looks proper when looking at the cert w/ s_client:

  openssl s_client -connect raw.githubusercontent.com:443 </dev/null
  2>/dev/null | openssl x509 -noout -text

              X509v3 Subject Alternative Name:
                  DNS:*.github.io, DNS:github.io, DNS:*.github.com, DNS:github.com, DNS:www.github.com, DNS:*.githubusercontent.com, DNS:githubusercontent.com

  Previous versions of curl work as intended.

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