On 09/23/2015 05:05 PM, Michael Lasevich wrote:
Yes, I am talking about 389ds as is integrated in FreeIPA (would be
silly to post completely non-IPA questions to this list...).
I am running FreeIPA 4.1.4 on CentOS 7.1 and RC4 is enabled on port
636 no matter what I do.
I am running "CentOS Linux release 7.1.1503 (Core)"
Relevant Packages:
freeipa-server-4.1.4-1.el7.centos.x86_64
389-ds-base-1.3.3.8-1.el7.centos.x86_64
nss-3.19.1-5.el7_1.x86_64
openssl-1.0.1e-42.el7.9.x86_64
LDAP setting (confirmed that in error.log there is no menition of RC4
in list of ciphers):
nsSSL3Ciphers:
-rc4,-rc4export,-rc2,-rc2export,-des,-desede3,-rsa_rc4_128_md5,-rsa_rc4_128_sha,+rsa_3des_sha,-rsa_des_sha,+rsa_fips_3des_sha,+fips_3des_sha,-rsa_fips_des_sha,-fips_des_sha,-rsa_rc4_40_md5,-rsa_rc2_40_md5,-rsa_null_md5,-rsa_null_sha,-tls_rsa_export1024_with_rc4_56_sha,-rsa_rc4_56_sha,-tls_rsa_export1024_with_des_cbc_sha,-rsa_des_56_sha,-fortezza,-fortezza_rc4_128_sha,-fortezza_null,-dhe_dss_des_sha,+dhe_dss_3des_sha,-dhe_rsa_des_sha,+dhe_rsa_3des_sha,+tls_rsa_aes_128_sha,+rsa_aes_128_sha,+tls_dhe_dss_aes_128_sha,+tls_dhe_rsa_aes_128_sha,+tls_rsa_aes_256_sha,+rsa_aes_256_sha,+tls_dhe_dss_aes_256_sha,+tls_dhe_rsa_aes_256_sha,-tls_dhe_dss_1024_rc4_sha,-tls_dhe_dss_rc4_128_sha
with ipa the config entry should contain:
dn: cn=encryption,cn=config
allowWeakCipher: off
nsSSL3Ciphers: +all
could you try this setting
Slapd "error" log showing no ciphersuites supporting RC4:
[23/Sep/2015:08:51:04 -0600] SSL Initialization - Configured SSL
version range: min: TLS1.0, max: TLS1.2
[23/Sep/2015:08:51:04 -0600] - SSL alert: Cipher suite fortezza is not
available in NSS 3.16. Ignoring fortezza
[23/Sep/2015:08:51:04 -0600] - SSL alert: Cipher suite
fortezza_rc4_128_sha is not available in NSS 3.16. Ignoring
fortezza_rc4_128_sha
[23/Sep/2015:08:51:04 -0600] - SSL alert: Cipher suite fortezza_null
is not available in NSS 3.16. Ignoring fortezza_null
[23/Sep/2015:08:51:04 -0600] - SSL alert: Configured NSS Ciphers
[23/Sep/2015:08:51:04 -0600] - SSL alert:
TLS_DHE_RSA_WITH_AES_128_CBC_SHA: enabled
[23/Sep/2015:08:51:04 -0600] - SSL alert:
TLS_DHE_DSS_WITH_AES_128_CBC_SHA: enabled
[23/Sep/2015:08:51:04 -0600] - SSL alert:
TLS_DHE_RSA_WITH_AES_256_CBC_SHA: enabled
[23/Sep/2015:08:51:04 -0600] - SSL alert:
TLS_DHE_DSS_WITH_AES_256_CBC_SHA: enabled
[23/Sep/2015:08:51:04 -0600] - SSL alert:
TLS_RSA_WITH_AES_128_CBC_SHA: enabled
[23/Sep/2015:08:51:04 -0600] - SSL alert:
TLS_RSA_WITH_AES_256_CBC_SHA: enabled
[23/Sep/2015:08:51:04 -0600] - 389-Directory/1.3.3.8 <http://1.3.3.8>
B2015.040.128 starting up
But sslscan returns:
$ sslscan --no-failed localhost:636
...
Supported Server Cipher(s):
Accepted TLSv1 256 bits AES256-SHA
Accepted TLSv1 128 bits AES128-SHA
Accepted TLSv1 128 bits DES-CBC3-SHA
Accepted TLSv1 128 bits RC4-SHA
Accepted TLSv1 128 bits RC4-MD5
Accepted TLS11 256 bits AES256-SHA
Accepted TLS11 128 bits AES128-SHA
Accepted TLS11 128 bits DES-CBC3-SHA
Accepted TLS11 128 bits RC4-SHA
Accepted TLS11 128 bits RC4-MD5
Accepted TLS12 256 bits AES256-SHA256
Accepted TLS12 256 bits AES256-SHA
Accepted TLS12 128 bits AES128-GCM-SHA256
Accepted TLS12 128 bits AES128-SHA256
Accepted TLS12 128 bits AES128-SHA
Accepted TLS12 128 bits DES-CBC3-SHA
Accepted TLS12 128 bits RC4-SHA
Accepted TLS12 128 bits RC4-MD5
...
I would assume the sslscan is broken, but nmap and other scanners all
confirm that RC4 is still on.
-M
On Wed, Sep 23, 2015 at 3:35 AM, Martin Kosek <mko...@redhat.com
<mailto:mko...@redhat.com>> wrote:
On 09/23/2015 11:00 AM, Michael Lasevich wrote:
> OK, this is most bizarre issue,
>
> I am trying to disable RC4 based TLS Cipher Suites in LDAPs(port
636) and
> for the life of me cannot get it to work
>
> I have followed many nearly identical instructions to create
ldif file and
> change "nsSSL3Ciphers" in "cn=encryption,cn=config". Seems
simple enough -
> and I get it to take, and during the startup I can see the right
SSL Cipher
> Suites listed in errors.log - but when it starts and I probe it, RC4
> ciphers are still there. I am completely confused.
>
> I tried setting "nsSSL3Ciphers" to "default" (which does not
have "RC4")
> and to old style cyphers lists(lowercase), and new style cypher
> lists(uppercase), and nothing seems to make any difference.
>
> Any ideas?
>
> -M
Are you asking about standalone 389-DS or the one integrated in
FreeIPA? As
with currently supported versions of FreeIPA, RC4 ciphers should
be already
gone, AFAIK.
In RHEL/CentOS world, it should be fixed in 6.7/7.1 or later:
https://bugzilla.redhat.com/show_bug.cgi?id=1154687
https://fedorahosted.org/freeipa/ticket/4653
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