[SAC] [OSGeo] #2296: download.osgeo.org certificate not recognized by curl / wget

[OSGeo]

#2296: download.osgeo.org certificate not recognized by curl / wget
---------------------------+-------------------
 Reporter:  rouault        |      Owner:  sac@…
     Type:  defect         |     Status:  new
 Priority:  normal         |  Milestone:
Component:  Systems Admin  |   Keywords:
---------------------------+-------------------
 Since a few hours ago (April 28 2019), I get errors from curl and wget
 when downloading from https://download.osgeo.org. This is on Ubuntu 16.04
 (and also true from Travis-CI workers)

 {{{
 $ curl https://download.osgeo.org/proj/proj-6.0.0RC4.tar.gz
 curl: (60) server certificate verification failed. CAfile: /etc/ssl/certs
 /ca-certificates.crt CRLfile: none
 More details here: http://curl.haxx.se/docs/sslcerts.html

 curl performs SSL certificate verification by default, using a "bundle"
  of Certificate Authority (CA) public keys (CA certs). If the default
  bundle file isn't adequate, you can specify an alternate file
  using the --cacert option.
 If this HTTPS server uses a certificate signed by a CA represented in
  the bundle, the certificate verification probably failed due to a
  problem with the certificate (it might be expired, or the name might
  not match the domain name in the URL).
 If you'd like to turn off curl's verification of the certificate, use
  the -k (or --insecure) option.
 }}}

 {{{
 $ wget https://download.osgeo.org/proj/proj-6.0.0RC4.tar.gz
 --2019-04-28 12:25:26--
 https://download.osgeo.org/proj/proj-6.0.0RC4.tar.gz
 Resolving download.osgeo.org (download.osgeo.org)... 140.211.15.132
 Connecting to download.osgeo.org
 (download.osgeo.org)|140.211.15.132|:443... connected.
 ERROR: cannot verify download.osgeo.org's certificate, issued by
 'CN=Let\'s Encrypt Authority X3,O=Let\'s Encrypt,C=US':
   Unable to locally verify the issuer's authority.
 To connect to download.osgeo.org insecurely, use `--no-check-certificate'.
 }}}

 In Firefox 66, this works

-- 
Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2296>
OSGeo <https://osgeo.org/>
OSGeo committee and general foundation issue tracker.