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Bug 1992551

Summary: freeradius with ldap module failed to start (TLS: can't accept: (unknown))
Product: Red Hat Enterprise Linux 9 Reporter: Filip Dvorak <fdvorak>
Component: freeradiusAssignee: Antonio Torres <antorres>
Status: CLOSED ERRATA QA Contact: Filip Dvorak <fdvorak>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 9.0CC: fdvorak, nikolai.kondrashov
Target Milestone: betaKeywords: Triaged
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: freeradius-3.0.21-25.el9 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2022-05-17 12:40:04 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Filip Dvorak 2021-08-11 09:53:46 UTC 
Description of problem:
If the Freeradius is configured to authenticate users via LDAP and TLS (with rlm_ldap module) it fails to start due to the following error on RHEL9:

...
TLS trace: SSL_accept:error in TLSv1.3 early data
TLS: can't accept: (unknown).
...

Version-Release number of selected component (if applicable):
freeradius-3.0.21-18.el9.x86_64
RHEL-9.0.0-20210725.3
openldap-servers-2.4.57-7.el9.x86_64
OpenSSL 3.0.0-beta1 17 Jun 2021 (Library: OpenSSL 3.0.0-beta1 17 Jun 2021)


Steps to Reproduce:
1. Configure openldap server with certificates and check if it is possible to do ldapsearch via TLS.
ldapsearch -H ldaps://dell-per430-27.gsslab.pek2.redhat.com -x '*'

(slapd.conf was attached)

TLSCipherSuite        HIGH:MEDIUM:+SSLv2
TLSCACertificateFile  /etc/openldap/certs/ca.pem
TLSCertificateFile    /etc/openldap/certs/server-cert.pem
TLSCertificateKeyFile /etc/openldap/certs/server-key.pem
TLSVerifyClient demand

2. Install FR, generate def. certificates and configure FR to use ldap module.

3. Add attached certificates into tls section in /etc/radd/mods-available/ldap
...
   tls {
        ca_file = "/etc/raddb/certs/ldap-server-ca.pem"
        certificate_file = "/etc/raddb/certs/ldap-client-cert.pem"
        private_key_file = "/etc/raddb/certs/ldap-client-key.pem"
        start_tls = no
        require_cert = "allow"
...
4. radiusd -X

Actual results:
...
lm_ldap (ldap): Opening additional connection (0), 1 of 32 pending slots used
rlm_ldap (ldap): Connecting to ldap://$(hostname):636
61139ce8 slap_listener_activate(8): 
61139ce8 >>> slap_listener(ldaps:///)
61139ce8 connection_get(18): got connid=1011
rlm_ldap (ldap): Waiting for bind result...
61139ce8 connection_read(18): checking for input on id=1011
rlm_ldap (ldap): Bind with (anonymous) to ldap://hostname:636 failed: Server is busy
TLS trace: SSL_accept:before SSL initialization
TLS trace: SSL_accept:before SSL initialization
rlm_ldap (ldap): Opening connection failed (0)
rlm_ldap (ldap): Removing connection pool
/etc/raddb/mods-enabled/ldap[8]: Instantiation failed for module "ldap"

Expected results:
radiusd should start

Additional info:
- used certificates were attached
- output from radiusd -X was attached
- output from slapd -d3 was attached  
- this scenario works on RHEL8.5
- to reproduce this issue run TCMS test "freeradius-Sanity-freeradius-openldap-auth-test"
- legacy openssl provider was used
Providers:
  default
    name: OpenSSL Default Provider
    version: 3.0.0
    status: active
  legacy
    name: OpenSSL Legacy Provider
    version: 3.0.0
    status: active
Comment 22 errata-xmlrpc 2022-05-17 12:40:04 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (new packages: freeradius), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2371