Secure AEM against various SSL / TLS vulnerabilities | AEM 6.x

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How do we protect AEM's https port against newer SSL / TLS security vulnerabilities? For example, LOGJAM or SWEET32.

Environment

AEM 6.x

Steps

To protect against various SSL vulnerabilities on an AEM instance's HTTPS port, follow the steps below.

  1. Log in to your AEM server and add the JVM parameter below to the java command:

    -Djdk.tls.ephemeralDHKeySize=2048

    If you are using the out of the box crx-quickstart/bin/start script, then this is done by adding the variable above to the CQ_JVM_OPTS variable.

  2. Restart AEM after adding the JVM option.  You can validate that the JVM option / system property was picked up on this screen https://aem-host:port/system/console/jmx/java.lang%3Atype%3DRuntime.  Search the page and validate that the property jdk.tls.ephemeralDHKeySize is now set to 2048.

  3. If you have https support configured, then go to https://aem-host:port/crx/de/index.jsp and log in as admin.

  4. Browse to /apps/system/config/org.apache.felix.http.config.

  5. Modify the configuration file.  Replace the four configuration properties listed below in the file with the values provided [1].  If a variable does not exist in your configuration, then copy it to the end of the configuration file.  

    • org.apache.felix.https.jetty.ciphersuites.excluded
    • org.apache.felix.https.jetty.ciphersuites.included
    • org.apache.felix.https.jetty.protocols.excluded
    • org.apache.felix.https.jetty.protocols.included

    A sample configuration file is provided below [2].

  6. Click Save All. 

  7. After applying the updated configuration, validate that the configuration took effect.  Go to this URL https://aem-host:port/system/console/configMgr/org.apache.felix.http.config and review the configuration to see that the property values were carried over.

  8. Use a tool like testssh.sh to validate that the system is no longer vulnerable.

Additional information

It is recommended to configure your systems with optimal security to access AEM instance directly. [1]

org.apache.felix.https.jetty.ciphersuites.excluded=[\
"SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA",\
"SSL_DHE_DSS_WITH_AES_128_CBC_SHA",\
"SSL_DHE_DSS_WITH_AES_256_CBC_SHA",\
"SSL_DHE_DSS_WITH_DES_CBC_SHA",\
"SSL_DHE_DSS_WITH_RC4_128_SHA",\
"SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA",\
"SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"SSL_DHE_RSA_WITH_AES_128_CBC_SHA",\
"SSL_DHE_RSA_WITH_AES_256_CBC_SHA",\
"SSL_DHE_RSA_WITH_DES_CBC_SHA",\
"SSL_RSA_EXPORT_WITH_DES40_CBC_SHA",\
"SSL_RSA_EXPORT_WITH_RC4_40_MD5",\
"SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA",\
"SSL_RSA_FIPS_WITH_DES_EDE_CBC_SHA",\
"SSL_RSA_WITH_DES_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA",\
"TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_DH_anon_WITH_3DES_EDE_CBC_SHA",\
"TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA",\
"TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"PCT_SSL_CIPHER_TYPE_1ST_HALF",\
"SSL_DH_anon_EXPORT_WITH_RC4_40_MD5",\
"SSL_DH_anon_WITH_RC4_128_MD5",\
"SSL_RSA_EXPORT_WITH_RC4_40_MD5",\
"SSL_RSA_WITH_RC4_128_MD5",\
"SSL_RSA_WITH_RC4_128_SHA",\
"SSL2_RC4_128_EXPORT40_WITH_MD5",\
"SSL2_RC4_128_WITH_MD5",\
"SSL2_RC4_64_WITH_MD5",\
"TLS_DH_Anon_EXPORT_WITH_RC4_40_MD5",\
"TLS_DH_Anon_WITH_RC4_128_MD5",\
"TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA",\
"TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA256",\
"TLS_DHE_DSS_WITH_RC4_128_SHA",\
"TLS_DHE_DSS_WITH_RC4_128_SHA256",\
"TLS_DHE_PSK_WITH_RC4_128_SHA",\
"TLS_DHE_PSK_WITH_RC4_128_SHA256",\
"TLS_ECDH_Anon_WITH_RC4_128_SHA",\
"TLS_ECDH_Anon_WITH_RC4_128_SHA256",\
"TLS_ECDH_ECDSA_WITH_RC4_128_SHA",\
"TLS_ECDH_ECDSA_WITH_RC4_128_SHA256",\
"TLS_ECDH_RSA_WITH_RC4_128_SHA",\
"TLS_ECDH_RSA_WITH_RC4_128_SHA256",\
"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA",\
"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA256",\
"TLS_ECDHE_PSK_WITH_RC4_128_SHA",\
"TLS_ECDHE_PSK_WITH_RC4_128_SHA256",\
"TLS_ECDHE_RSA_WITH_RC4_128_SHA",\
"TLS_ECDHE_RSA_WITH_RC4_128_SHA256",\
"TLS_KRB5_EXPORT_WITH_RC4_40_MD5",\
"TLS_KRB5_EXPORT_WITH_RC4_40_SHA",\
"TLS_KRB5_EXPORT_WITH_RC4_40_SHA256",\
"TLS_KRB5_WITH_RC4_128_MD5",\
"TLS_KRB5_WITH_RC4_128_SHA",\
"TLS_KRB5_WITH_RC4_128_SHA256",\
"TLS_PSK_WITH_RC4_128_SHA",\
"TLS_PSK_WITH_RC4_128_SHA256",\
"TLS_RSA_EXPORT_WITH_RC4_40_MD5",\
"TLS_RSA_EXPORT1024_WITH_RC4_56_MD5",\
"TLS_RSA_EXPORT1024_WITH_RC4_56_SHA",\
"TLS_RSA_EXPORT1024_WITH_RC4_56_SHA256",\
"TLS_RSA_PSK_WITH_RC4_128_SHA",\
"TLS_RSA_PSK_WITH_RC4_128_SHA256",\
"TLS_RSA_WITH_RC4_128_MD5",\
"TLS_RSA_WITH_RC4_128_SHA",\
"TLS_RSA_WITH_RC4_128_SHA256",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
".*3DES_EDE_CBC.*"\
]
org.apache.felix.https.jetty.ciphersuites.included=[ \
  "", \
  ]
org.apache.felix.https.jetty.protocols.excluded=[ \
  "SSLv3", \
  "SSL", \
  "SSLv2", \
  "SSLv2Hello", \
  "TLSv1.0", \
  "TLSv1.1", \
  ]
org.apache.felix.https.jetty.protocols.included=[ \
  "TLSv1.2"
  ]

[2] Sample of /apps/system/config/org.apache.felix.http.config

# Configuration created by Apache Sling JCR Installer
org.apache.felix.http.timeout=I"60000"
org.apache.felix.http.jetty.acceptors=I"-1"
org.apache.felix.https.clientcertificate="none"
org.apache.felix.https.jetty.protocols.excluded=["SSLv3","SSL","SSLv2","SSLv2Hello","TLSv1.0","TLSv1.1"]
org.apache.felix.http.jetty.threadpool.max=I"-1"
org.osgi.service.http.port=I"4504"
org.eclipse.jetty.servlet.CheckingRemoteSessionIdEncoding=B"true"
org.apache.felix.http.enable=B"true"
org.apache.felix.https.jetty.protocols.included=["TLSv1.2"]
org.apache.felix.https.keystore="/opt/aem/author62/crx-quickstart/ssl/keystorename.keystore"
org.apache.felix.https.jetty.ciphersuites.excluded=[\
"SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA",\
"SSL_DHE_DSS_WITH_AES_128_CBC_SHA",\
"SSL_DHE_DSS_WITH_AES_256_CBC_SHA",\
"SSL_DHE_DSS_WITH_DES_CBC_SHA",\
"SSL_DHE_DSS_WITH_RC4_128_SHA",\
"SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA",\
"SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"SSL_DHE_RSA_WITH_AES_128_CBC_SHA",\
"SSL_DHE_RSA_WITH_AES_256_CBC_SHA",\
"SSL_DHE_RSA_WITH_DES_CBC_SHA",\
"SSL_RSA_EXPORT_WITH_DES40_CBC_SHA",\
"SSL_RSA_EXPORT_WITH_RC4_40_MD5",\
"SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA",\
"SSL_RSA_FIPS_WITH_DES_EDE_CBC_SHA",\
"SSL_RSA_WITH_DES_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_DH_DSS_WITH_3DES_EDE_CBC_SHA",\
"TLS_DH_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_DH_anon_WITH_3DES_EDE_CBC_SHA",\
"TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA",\
"TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"PCT_SSL_CIPHER_TYPE_1ST_HALF",\
"SSL_DH_anon_EXPORT_WITH_RC4_40_MD5",\
"SSL_DH_anon_WITH_RC4_128_MD5",\
"SSL_RSA_EXPORT_WITH_RC4_40_MD5",\
"SSL_RSA_WITH_RC4_128_MD5",\
"SSL_RSA_WITH_RC4_128_SHA",\
"SSL2_RC4_128_EXPORT40_WITH_MD5",\
"SSL2_RC4_128_WITH_MD5",\
"SSL2_RC4_64_WITH_MD5",\
"TLS_DH_Anon_EXPORT_WITH_RC4_40_MD5",\
"TLS_DH_Anon_WITH_RC4_128_MD5",\
"TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA",\
"TLS_DHE_DSS_EXPORT1024_WITH_RC4_56_SHA256",\
"TLS_DHE_DSS_WITH_RC4_128_SHA",\
"TLS_DHE_DSS_WITH_RC4_128_SHA256",\
"TLS_DHE_PSK_WITH_RC4_128_SHA",\
"TLS_DHE_PSK_WITH_RC4_128_SHA256",\
"TLS_ECDH_Anon_WITH_RC4_128_SHA",\
"TLS_ECDH_Anon_WITH_RC4_128_SHA256",\
"TLS_ECDH_ECDSA_WITH_RC4_128_SHA",\
"TLS_ECDH_ECDSA_WITH_RC4_128_SHA256",\
"TLS_ECDH_RSA_WITH_RC4_128_SHA",\
"TLS_ECDH_RSA_WITH_RC4_128_SHA256",\
"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA",\
"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA256",\
"TLS_ECDHE_PSK_WITH_RC4_128_SHA",\
"TLS_ECDHE_PSK_WITH_RC4_128_SHA256",\
"TLS_ECDHE_RSA_WITH_RC4_128_SHA",\
"TLS_ECDHE_RSA_WITH_RC4_128_SHA256",\
"TLS_KRB5_EXPORT_WITH_RC4_40_MD5",\
"TLS_KRB5_EXPORT_WITH_RC4_40_SHA",\
"TLS_KRB5_EXPORT_WITH_RC4_40_SHA256",\
"TLS_KRB5_WITH_RC4_128_MD5",\
"TLS_KRB5_WITH_RC4_128_SHA",\
"TLS_KRB5_WITH_RC4_128_SHA256",\
"TLS_PSK_WITH_RC4_128_SHA",\
"TLS_PSK_WITH_RC4_128_SHA256",\
"TLS_RSA_EXPORT_WITH_RC4_40_MD5",\
"TLS_RSA_EXPORT1024_WITH_RC4_56_MD5",\
"TLS_RSA_EXPORT1024_WITH_RC4_56_SHA",\
"TLS_RSA_EXPORT1024_WITH_RC4_56_SHA256",\
"TLS_RSA_PSK_WITH_RC4_128_SHA",\
"TLS_RSA_PSK_WITH_RC4_128_SHA256",\
"TLS_RSA_WITH_RC4_128_MD5",\
"TLS_RSA_WITH_RC4_128_SHA",\
"TLS_RSA_WITH_RC4_128_SHA256",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",\
"TLS_RSA_WITH_3DES_EDE_CBC_SHA",\
".*3DES_EDE_CBC.*"\
]
org.apache.felix.http.path_exclusions=["/system"]
org.apache.felix.http.jetty.selectors=I"-1"
org.apache.felix.proxy.load.balancer.connection.enable=B"true"
org.eclipse.jetty.servlet.SessionDomain=""
org.apache.felix.https.jetty.renegotiateAllowed=B"false"
org.apache.felix.http.jetty.maxFormSize=I"204800"
org.apache.felix.http.jetty.sendServerHeader=B"false"
org.apache.felix.http.jetty.requestBufferSize=I"8192"
org.apache.felix.https.keystore.password="storepassword"
org.eclipse.jetty.servlet.SessionIdPathParameterName="jsessionid"
org.apache.felix.https.jetty.ciphersuites.included=[""]
org.apache.felix.http.mbeans=B"false"
org.apache.felix.http.host="0.0.0.0"
org.eclipse.jetty.servlet.SessionCookie="JSESSIONID"
org.eclipse.jetty.servlet.SessionPath=""
org.osgi.service.http.port.secure=I"54333"
org.apache.felix.https.jetty.session.cookie.httpOnly=B"true"
org.apache.felix.http.context_path="/"
org.apache.felix.https.enable=B"true"
org.apache.felix.https.keystore.key.password="key_password"
org.apache.felix.http.jetty.headerBufferSize=I"16384"
org.apache.felix.https.truststore=""
org.apache.felix.http.session.timeout=I"10"
org.eclipse.jetty.servlet.MaxAge=I"-1"
org.apache.felix.https.jetty.session.cookie.secure=B"false"
org.apache.felix.http.jetty.responseBufferSize=I"24576"

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