Curl: (60) SSL certificate problem: EE certificate key too weak

1 개요

EE certificate key too weak
# curl -v --cert /etc/pki/entitlement/5287657135911278332.pem --key /etc/pki/entitlement/5287657135911278332-key.pem  https://cdn.redhat.com/content/dist/rhel8/8/x86_64/appstream/os/repodata/repomd.xml -k

*   Trying 23.222.172.83...
* TCP_NODELAY set
* Connected to cdn.redhat.com (23.222.172.83) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, [no content] (0):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, [no content] (0):
* TLSv1.3 (IN), TLS handshake, Request CERT (13):
* TLSv1.3 (IN), TLS handshake, [no content] (0):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, [no content] (0):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, [no content] (0):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, [no content] (0):
* TLSv1.3 (OUT), TLS handshake, Certificate (11):
* TLSv1.3 (OUT), TLS handshake, [no content] (0):
* TLSv1.3 (OUT), TLS handshake, CERT verify (15):
* TLSv1.3 (OUT), TLS handshake, [no content] (0):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384
* ALPN, server accepted to use http/1.1
* Server certificate:
*  subject: C=US; ST=North Carolina; O=Red Hat, Inc.; OU=Red Hat Network; CN=cdn.redhat.com
*  start date: Apr 24 12:53:26 2019 GMT
*  expire date: Apr 23 12:53:26 2021 GMT
*  issuer: C=US; ST=North Carolina; O=Red Hat, Inc.; OU=Red Hat Network; CN=Red Hat Entitlement Operations Authority; emailAddress=ca-support@redhat.com
*  SSL certificate verify result: EE certificate key too weak (66), continuing anyway.
...
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3 참고

https://access.redhat.com/solutions/4740591