[Nessus] SSL Version 2 and 3 Protocol Detection

[marceloleaes]

Description

The remote service accepts connections encrypted using SSL 2.0 and/or SSL 3.0.
These versions of SSL are affected by several cryptographic flaws.
An attacker can exploit these flaws to conduct man-in-the-middle attacks or to decrypt communications
between the affected service and clients. NIST has determined that SSL 3.0 is no longer acceptable
for secure communications. As of the date of enforcement found in PCI DSS v3.1, any version of SSL
will not meet the PCI SSC'S definition of 'strong cryptography'.

Solution

Consult the application's documentation to disable SSL 2.0 and 3.0. Use TLS 1.1 (with approved cipher suites) or higher instead.

Resolução do problema base CentOS / Red Hat Linux

Editar /etc/httpd/conf.d/ssl.conf e procurar pela linha: # SSL Protocol support

Setar como ( dependendo da versão do SO )

RHEL 7.x:

Código: Selecionar todos

SSLHonorCipherOrder On
SSLProtocol -All +TLSv1 +TLSv1.1 +TLSv1.2

RHEL 6.x:

Código: Selecionar todos

SSLHonorCipherOrder On
SSLProtocol -All +TLSv1 +TLSv1.1 +TLSv1.2

RHEL 5.x:

Código: Selecionar todos

SSLHonorCipherOrder On
SSLProtocol -All +TLSv1

Código: Selecionar todos

/etc/init.d/httpd reload
/etc/init.d/httpd restart