Check: AS24-U1-000900
Apache Server 2.4 UNIX Server STIG:
AS24-U1-000900
(in versions v2 r7 through v2 r4)
Title
The Apache web server must remove all export ciphers to protect the confidentiality and integrity of transmitted information. (Cat II impact)
Discussion
During the initial setup of a Transport Layer Security (TLS) connection to the Apache web server, the client sends a list of supported cipher suites in order of preference. The Apache 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 Apache 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. Configuring the Apache server with only strong ciphersuites, denying or disabling weak ciphersuites, will prevent this vulnerability.
Check Content
Determine the location of the "HTTPD_ROOT" directory and the "httpd.conf" and "ssl.conf" files: Search the httpd.conf and ssl.conf file for the following uncommented directive: SSLCipherSuite # cat httpd.conf | grep -i SSLCipherSuite Output: None # cat /etc/httpd/conf.d/ssl.conf | grep -i SSLCipherSuite Output: SSLCipherSuite HIGH:3DES:!NULL:!MD5:!SEED:!IDEA:!EXPORT For all enabled SSLCipherSuite directives, ensure the cipher specification string contains the kill cipher from list option for all export cipher suites, i.e., !EXPORT, which may be abbreviated !EXP as in the following example: Example: SSLCipherSuite="HIGH:MEDIUM:!MD5!EXP:!NULL:!LOW:!ADH If the SSLCipherSuite directive does not contain !EXPORT or !EXP or there are no enabled SSLCipherSuite directives, this is a finding.
Fix Text
Update the cipher specification string for all enabled SSLCipherSuite directives to include !EXPORT.
Additional Identifiers
Rule ID: SV-214269r881463_rule
Vulnerability ID: V-214269
Group Title: SRG-APP-000439-WSR-000188
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-002418 |
The information system protects the confidentiality and/or integrity of transmitted information. |
Controls
Number | Title |
---|---|
SC-8 |
Transmission Confidentiality And Integrity |