Updated the TLS configuration.

This commit removes support for the TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA and TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA ciphers. It also removes support for CurveP384. This is to match up with recommendations given by Cloudflare [0], Mozilla (the "Intermediate" compatibility) [1], and referencing the default ciphers in Caddy [2].

[0] https://blog.cloudflare.com/exposing-go-on-the-internet/
[1] https://wiki.mozilla.org/Security/Server_Side_TLS#Intermediate_compatibility_.28recommended.29
[2] 008415f206/caddytls/config.go (L492)

Here is the diff of running testssl against the old and new configurations:

```
git diff --no-index -- old.txt new.txt
diff --git a/old.txt b/new.txt
index fc624a1..53d0c97 100644
--- a/old.txt
+++ b/new.txt
@@ -13,11 +13,11 @@ docker run --rm -ti -p 3333:3333 drwetter/testssl.sh https://host.docker.interna
 ###########################################################

  Using "OpenSSL 1.0.2-chacha (1.0.2k-dev)" [~183 ciphers]
- on 4831dc55e53f:$PWD/bin/openssl.Linux.x86_64
+ on 41ae723da66a:$PWD/bin/openssl.Linux.x86_64
  (built: "Jan 18 17:12:17 2019", platform: "linux-x86_64")

- Start 2020-03-28 02:54:41        -->> 192.168.65.2:3333 (host.docker.internal) <<--
+ Start 2020-03-28 03:15:21        -->> 192.168.65.2:3333 (host.docker.internal) <<--

  rDNS (192.168.65.2):    --
  Service detected:       HTTP
@@ -41,15 +41,14 @@ docker run --rm -ti -p 3333:3333 drwetter/testssl.sh https://host.docker.interna
  Export ciphers (w/o ADH+NULL)                 not offered (OK)
  LOW: 64 Bit + DES, RC[2,4] (w/o export)       not offered (OK)
  Triple DES Ciphers / IDEA                     not offered (OK)
- Obsolete: SEED + 128+256 Bit CBC cipher       offered
+ Obsolete: SEED + 128+256 Bit CBC cipher       not offered
  Strong encryption (AEAD ciphers)              offered (OK)

  Testing robust (perfect) forward secrecy, (P)FS -- omitting Null Authentication/Encryption, 3DES, RC4

- PFS is offered (OK)          TLS_AES_256_GCM_SHA384 TLS_CHACHA20_POLY1305_SHA256 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-AES256-SHA ECDHE-ECDSA-CHACHA20-POLY1305 TLS_AES_128_GCM_SHA256
-                              ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-ECDSA-AES128-SHA
- Elliptic curves offered:     prime256v1 secp384r1 secp521r1 X25519
+ PFS is offered (OK)          TLS_AES_256_GCM_SHA384 TLS_CHACHA20_POLY1305_SHA256 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-CHACHA20-POLY1305 TLS_AES_128_GCM_SHA256 ECDHE-ECDSA-AES128-GCM-SHA256
+ Elliptic curves offered:     prime256v1 X25519

  Testing server preferences
@@ -58,7 +57,7 @@ docker run --rm -ti -p 3333:3333 drwetter/testssl.sh https://host.docker.interna
  Negotiated protocol          TLSv1.3
  Negotiated cipher            TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
  Cipher order
-    TLSv1.2:   ECDHE-ECDSA-AES128-GCM-SHA256 ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-CHACHA20-POLY1305 ECDHE-ECDSA-AES128-SHA ECDHE-ECDSA-AES256-SHA
+    TLSv1.2:   ECDHE-ECDSA-AES256-GCM-SHA384 ECDHE-ECDSA-CHACHA20-POLY1305 ECDHE-ECDSA-AES128-GCM-SHA256
     TLSv1.3:   TLS_AES_128_GCM_SHA256 TLS_CHACHA20_POLY1305_SHA256 TLS_AES_256_GCM_SHA384

@@ -125,7 +124,7 @@ docker run --rm -ti -p 3333:3333 drwetter/testssl.sh https://host.docker.interna
                                            no RSA certificate, thus certificate can't be used with SSLv2 elsewhere
  LOGJAM (CVE-2015-4000), experimental      not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2
  BEAST (CVE-2011-3389)                     no SSL3 or TLS1 (OK)
- LUCKY13 (CVE-2013-0169), experimental     potentially VULNERABLE, uses cipher block chaining (CBC) ciphers with TLS. Check patches
+ LUCKY13 (CVE-2013-0169), experimental     not vulnerable (OK)
  RC4 (CVE-2013-2566, CVE-2015-2808)        no RC4 ciphers detected (OK)

@@ -136,50 +135,48 @@ Hexcode  Cipher Suite Name (OpenSSL)       KeyExch.   Encryption  Bits     Ciphe
  x1302   TLS_AES_256_GCM_SHA384            ECDH 253   AESGCM      256      TLS_AES_256_GCM_SHA384
  x1303   TLS_CHACHA20_POLY1305_SHA256      ECDH 253   ChaCha20    256      TLS_CHACHA20_POLY1305_SHA256
  xc02c   ECDHE-ECDSA-AES256-GCM-SHA384     ECDH 256   AESGCM      256      TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- xc00a   ECDHE-ECDSA-AES256-SHA            ECDH 256   AES         256      TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  xcca9   ECDHE-ECDSA-CHACHA20-POLY1305     ECDH 253   ChaCha20    256      TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
  x1301   TLS_AES_128_GCM_SHA256            ECDH 253   AESGCM      128      TLS_AES_128_GCM_SHA256
  xc02b   ECDHE-ECDSA-AES128-GCM-SHA256     ECDH 256   AESGCM      128      TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- xc009   ECDHE-ECDSA-AES128-SHA            ECDH 256   AES         128      TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA

- LUCKY13 (CVE-2013-0169), experimental     potentially VULNERABLE, uses cipher block chaining (CBC) ciphers with TLS. Check patches
+ LUCKY13 (CVE-2013-0169), experimental     not vulnerable (OK)
  RC4 (CVE-2013-2566, CVE-2015-2808)        no RC4 ciphers detected (OK)

@@ -136,50 +135,48 @@ Hexcode  Cipher Suite Name (OpenSSL)       KeyExch.   Encryption  Bits     Ciphe
  x1302   TLS_AES_256_GCM_SHA384            ECDH 253   AESGCM      256      TLS_AES_256_GCM_SHA384
  x1303   TLS_CHACHA20_POLY1305_SHA256      ECDH 253   ChaCha20    256      TLS_CHACHA20_POLY1305_SHA256
  xc02c   ECDHE-ECDSA-AES256-GCM-SHA384     ECDH 256   AESGCM      256      TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
- xc00a   ECDHE-ECDSA-AES256-SHA            ECDH 256   AES         256      TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
  xcca9   ECDHE-ECDSA-CHACHA20-POLY1305     ECDH 253   ChaCha20    256      TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
  x1301   TLS_AES_128_GCM_SHA256            ECDH 253   AESGCM      128      TLS_AES_128_GCM_SHA256
  xc02b   ECDHE-ECDSA-AES128-GCM-SHA256     ECDH 256   AESGCM      128      TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
- xc009   ECDHE-ECDSA-AES128-SHA            ECDH 256   AES         128      TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA

  Running client simulations (HTTP) via sockets

- Android 4.4.2                TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
+ Android 4.4.2                TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
  Android 5.0.0                TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
  Android 6.0                  TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- Android 7.0                  TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
- Android 8.1 (native)         TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
+ Android 7.0                  TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
+ Android 8.1 (native)         TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
  Android 9.0 (native)         TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
- Chrome 65 Win 7              TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
+ Chrome 65 Win 7              TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
  Chrome 74 (Win 10)           TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
- Firefox 62 Win 7             TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
+ Firefox 62 Win 7             TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
  Firefox 66 (Win 8.1/10)      TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
  IE 6 XP                      No connection
  IE 8 Win 7                   No connection
  IE 8 XP                      No connection
- IE 11 Win 7                  TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- IE 11 Win 8.1                TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- IE 11 Win Phone 8.1          TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- IE 11 Win 10                 TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- Edge 15 Win 10               TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
- Edge 17 (Win 10)             TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
+ IE 11 Win 7                  TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ IE 11 Win 8.1                TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ IE 11 Win Phone 8.1          TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ IE 11 Win 10                 TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ Edge 15 Win 10               TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
+ Edge 17 (Win 10)             TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
  Opera 60 (Win 10)            TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
- Safari 9 iOS 9               TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- Safari 9 OS X 10.11          TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- Safari 10 OS X 10.12         TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
+ Safari 9 iOS 9               TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ Safari 9 OS X 10.11          TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ Safari 10 OS X 10.12         TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
  Safari 12.1 (iOS 12.2)       TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
  Safari 13.0 (macOS 10.14.6)  TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
- Apple ATS 9 iOS 9            TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
+ Apple ATS 9 iOS 9            TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
  Java 6u45                    No connection
  Java 7u25                    No connection
- Java 8u161                   TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
+ Java 8u161                   TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
  Java 11.0.2 (OpenJDK)        TLSv1.3 TLS_AES_128_GCM_SHA256, 256 bit ECDH (P-256)
  Java 12.0.1 (OpenJDK)        TLSv1.3 TLS_AES_128_GCM_SHA256, 256 bit ECDH (P-256)
- OpenSSL 1.0.1l               TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- OpenSSL 1.0.2e               TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 256 bit ECDH (P-256)
- OpenSSL 1.1.0j (Debian)      TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256, 253 bit ECDH (X25519)
+ OpenSSL 1.0.1l               TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ OpenSSL 1.0.2e               TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 256 bit ECDH (P-256)
+ OpenSSL 1.1.0j (Debian)      TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384, 253 bit ECDH (X25519)
  OpenSSL 1.1.1b (Debian)      TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)
  Thunderbird (60.6)           TLSv1.3 TLS_AES_128_GCM_SHA256, 253 bit ECDH (X25519)

- Done 2020-03-28 02:57:48 [ 189s] -->> 192.168.65.2:3333 (host.docker.internal) <<--
+ Done 2020-03-28 03:17:25 [ 128s] -->> 192.168.65.2:3333 (host.docker.internal) <<--
```

Fixes #1698
pull/1813/head
Jordan Wright 2020-03-27 22:25:18 -05:00
parent 138b486b2f
commit 07b46d226a
2 changed files with 23 additions and 7 deletions

View File

@ -3,7 +3,6 @@ package controllers
import ( import (
"compress/gzip" "compress/gzip"
"context" "context"
"crypto/tls"
"errors" "errors"
"fmt" "fmt"
"net" "net"
@ -86,9 +85,7 @@ func WithContactAddress(addr string) PhishingServerOption {
func (ps *PhishingServer) Start() { func (ps *PhishingServer) Start() {
if ps.config.UseTLS { if ps.config.UseTLS {
// Only support TLS 1.2 and above - ref #1691, #1689 // Only support TLS 1.2 and above - ref #1691, #1689
ps.server.TLSConfig = &tls.Config{ ps.server.TLSConfig = defaultTLSConfig
MinVersion: tls.VersionTLS12,
}
err := util.CheckAndCreateSSL(ps.config.CertPath, ps.config.KeyPath) err := util.CheckAndCreateSSL(ps.config.CertPath, ps.config.KeyPath)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)

View File

@ -38,6 +38,27 @@ type AdminServer struct {
config config.AdminServer config config.AdminServer
} }
var defaultTLSConfig = &tls.Config{
PreferServerCipherSuites: true,
CurvePreferences: []tls.CurveID{
tls.X25519,
tls.CurveP256,
},
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
// Kept for backwards compatibility with some clients
tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
},
}
// WithWorker is an option that sets the background worker. // WithWorker is an option that sets the background worker.
func WithWorker(w worker.Worker) AdminServerOption { func WithWorker(w worker.Worker) AdminServerOption {
return func(as *AdminServer) { return func(as *AdminServer) {
@ -72,9 +93,7 @@ func (as *AdminServer) Start() {
} }
if as.config.UseTLS { if as.config.UseTLS {
// Only support TLS 1.2 and above - ref #1691, #1689 // Only support TLS 1.2 and above - ref #1691, #1689
as.server.TLSConfig = &tls.Config{ as.server.TLSConfig = defaultTLSConfig
MinVersion: tls.VersionTLS12,
}
err := util.CheckAndCreateSSL(as.config.CertPath, as.config.KeyPath) err := util.CheckAndCreateSSL(as.config.CertPath, as.config.KeyPath)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)