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I am running into issues where the CA bundle that has been bundled with my version of cURL is outdated.

curl: (60) SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
More details here: http://curl.haxx.se/docs/sslcerts.html

Reading through the documentation didn't help me because I didn't understand what I needed to do or how to do it. I am running RedHat and need to update the CA bundle. What do I need to do to update my CA bundle on RedHat?

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4 Answers 4

up vote 20 down vote accepted

Curl is using the system-default CA bundle is stored in /etc/pki/tls/certs/ca-bundle.crt . Before you change it, make a copy of that file so that you can restore the system default if you need to. You can simply append new CA certificates to that file, or you can replace the entire bundle.

Are you also wondering where to get the certificates? I (and others) recommend curl.haxx.se/ca . In one line:

curl http://curl.haxx.se/ca/cacert.pem -o /etc/pki/tls/certs/ca-bundle.crt

Alternately, you can follow instructions in this article to request the certs over https.

Fedora Core 2 location is /usr/share/ssl/certs/ca-bundle.crt.

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worked perfect, thanks! –  Andrew Jun 1 '12 at 23:02
Great solution, it worked perfectly for me! :) –  Jason Ilicic Jul 16 at 6:20
That's good, but how can I be sure the certificate that I add won't be lost at the next update of ca-bundle.crt? Is there a place I can put the new one where it will automatically be included? –  Andrew Schulman Sep 22 at 9:16
As of 2006, openssl upgrades shouldn't replace the ca-bundle.crt file (see rhn.redhat.com/errata/RHSA-2006-0661.html). However, if you have another package installed, like the ca-certificates package recommended by @mgorven, then I expect it would be manually overwritten. –  Nada Sep 23 at 10:38

The recommended way of doing that on RHEL 6+ systems is to use update-ca-trust tool, which is now installed by default.

# cat /etc/pki/ca-trust/source/README 
This directory /etc/pki/ca-trust/source/ contains CA certificates and 
trust settings in the PEM file format. The trust settings found here will be
interpreted with a high priority - higher than the ones found in 

QUICK HELP: To add a certificate in the simple PEM or DER file formats to the
            list of CAs trusted on the system:

            Copy it to the
            subdirectory, and run the

            If your certificate is in the extended BEGIN TRUSTED file format,
            then place it into the main source/ directory instead.

Please refer to the update-ca-trust(8) manual page for additional information

Therefore, you only need to drop your crt file to the /etc/pki/ca-trust/source/anchors/ and to run the tool. Work done. This is safe to do, you don't need to do any backups. Full manual page can be found here: https://www.mankier.com/8/update-ca-trust

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Probably depends which version of Redhat. You can find which package actually updates the file by doing:

rpm -qf /etc/pki/tls/certs/ca-bundle.crt

My result was showing that openssl-0.9.8e-12.el5 needs to be updated.

If there is no updated certificates in your distribution, you have to manually update, as per Nada's answer.

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RHEL provides the Mozilla CA certificates as part of the ca-certificates package (install this with yum if it's not already installed). To tell cURL to use these, use the --cacert parameter like so.

curl --cacert /etc/ssl/certs/ca-bundle.crt https://google.com/
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I tried yum install ca-certificates and got No package ca-certificates available –  Andrew Jun 1 '12 at 18:31
RHEL6 has this package; i'm guessing you are using an older version. Unfortunately the list hasn't changed since 2010, thanks for keeping us up to date redhat. –  Dan Pritts Jan 23 '13 at 22:30

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