V-241738

Discussion

During the initial setup of a Transport Layer Security (TLS) connection to the web server, the client sends a list of supported cipher suites in order of preference. The web server will reply with the cipher suite it will use for communication from the client list. If an attacker can intercept the submission of cipher suites to the web server and place, as the preferred cipher suite, a weak export suite, the encryption used for the session becomes easy for the attacker to break, often within minutes to hours. An essential configuration file for tc Server is “catalina.properties”. Properly configured, tc Server will not provide the weaker, export ciphers.

Check Content

At the command prompt, execute the following command:

grep -A 10 vmware-casa.ssl.ciphers.list /usr/lib/vmware-casa/casa-webapp/conf/catalina.properties

If any export ciphers are listed, this is a finding.

Note: To view a list of export ciphers, at the command prompt execute the following command:

openssl ciphers 'EXP'