Quick Note: Disable SSLv3 in OpenLDAP with GnuTLS
Published in
1 min readOct 15, 2014
Due to the SSL POODLE vulnerability, it is best to remove support for the outdated SSLv3 protocol. As OpenLDAP with GnuTLS is a beast of its own, here’s the quick change to remove SSLv3 support:
cat > nossl.ldif <<EOF
dn: cn=config
changetype: modify
add: olcTLSCipherSuite
olcTLSCipherSuite: SECURE256:-VERS-SSL3.0EOFldapmodify -Y EXTERNAL -H ldapi:/// -f nossl.ldif
And we’re done! Obviously, if you already have olcTLSCipgerSuite, then use “replace” instead of “add”.
A quick test:
~# gnutls-cli-debug -p 636 127.0.0.1
Resolving '127.0.0.1'...
Connecting to '127.0.0.1:636'...
Checking for SSL 3.0 support... no
Checking whether %COMPAT is required... no
Checking for TLS 1.0 support... yes
Checking for TLS 1.1 support... yes
Checking fallback from TLS 1.1 to... N/A
Checking for TLS 1.2 support... yes
