[PATCH] Apache: drop CBC ciphers for WebUI

[PATCH] Apache: drop CBC ciphers for WebUI

[peter.mueller]

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CBC ciphers contain some known vulnerabilities and should not be used
anymore. While dropping them for OpenSSL clients or public web servers
still causes interoperability problems with legacy setups, they can
be safely removed from IPFire's administrative UI.

This patch changes the used cipersuite to:

TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any      Au=any  Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_AES_256_GCM_SHA384  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(256) Mac=AEAD
TLS_AES_128_GCM_SHA256  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(128) Mac=AEAD
ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256) Mac=AEAD
ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128) Mac=AEAD
ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AESGCM(256) Mac=AEAD
ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=RSA  Enc=CHACHA20/POLY1305(256) Mac=AEAD
ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AESGCM(128) Mac=AEAD

Since TLS 1.3 ciphers will be added automatically by OpenSSL, mentioning
them in "SSLCipherSuite" is unnecessary. ECDSA is preferred over RSA for
performance reasons.

Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
---
 config/httpd/vhosts.d/ipfire-interface-ssl.conf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/httpd/vhosts.d/ipfire-interface-ssl.conf b/config/httpd/vhosts.d/ipfire-interface-ssl.conf
index 0166c4920..2009184bb 100644
--- a/config/httpd/vhosts.d/ipfire-interface-ssl.conf
+++ b/config/httpd/vhosts.d/ipfire-interface-ssl.conf
@@ -11,7 +11,7 @@
 
     SSLEngine on
     SSLProtocol all -SSLv3 -TLSv1 -TLSv1.1
-    SSLCipherSuite TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256
+    SSLCipherSuite AESGCM+EECDH:CHACHA20+EECDH:@STRENGTH:+aRSA
     SSLHonorCipherOrder on
     SSLCompression off
     SSLSessionTickets off
-- 
2.16.4

Re: [PATCH] Apache: drop CBC ciphers for WebUI

[Michael Tremer]

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Acked-by: Michael Tremer <michael.tremer(a)ipfire.org>

> On 4 Nov 2019, at 18:35, peter.mueller(a)ipfire.org wrote:
> 
> CBC ciphers contain some known vulnerabilities and should not be used
> anymore. While dropping them for OpenSSL clients or public web servers
> still causes interoperability problems with legacy setups, they can
> be safely removed from IPFire's administrative UI.
> 
> This patch changes the used cipersuite to:
> 
> TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any      Au=any  Enc=CHACHA20/POLY1305(256) Mac=AEAD
> TLS_AES_256_GCM_SHA384  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(256) Mac=AEAD
> TLS_AES_128_GCM_SHA256  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(128) Mac=AEAD
> ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(256) Mac=AEAD
> ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD
> ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=ECDSA Enc=AESGCM(128) Mac=AEAD
> ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AESGCM(256) Mac=AEAD
> ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH     Au=RSA  Enc=CHACHA20/POLY1305(256) Mac=AEAD
> ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AESGCM(128) Mac=AEAD
> 
> Since TLS 1.3 ciphers will be added automatically by OpenSSL, mentioning
> them in "SSLCipherSuite" is unnecessary. ECDSA is preferred over RSA for
> performance reasons.
> 
> Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
> ---
> config/httpd/vhosts.d/ipfire-interface-ssl.conf | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/config/httpd/vhosts.d/ipfire-interface-ssl.conf b/config/httpd/vhosts.d/ipfire-interface-ssl.conf
> index 0166c4920..2009184bb 100644
> --- a/config/httpd/vhosts.d/ipfire-interface-ssl.conf
> +++ b/config/httpd/vhosts.d/ipfire-interface-ssl.conf
> @@ -11,7 +11,7 @@
> 
>     SSLEngine on
>     SSLProtocol all -SSLv3 -TLSv1 -TLSv1.1
> -    SSLCipherSuite TLS_CHACHA20_POLY1305_SHA256:TLS_AES_256_GCM_SHA384:TLS_AES_128_GCM_SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256
> +    SSLCipherSuite AESGCM+EECDH:CHACHA20+EECDH:@STRENGTH:+aRSA
>     SSLHonorCipherOrder on
>     SSLCompression off
>     SSLSessionTickets off
> -- 
> 2.16.4