Resolution for POODLE SSLv3.0 vulnerability (CVE-2014-3566) in vsftpd

Solution In Progress - Updated -

Environment

  • Red Hat Enterprise Linux 5, 6, 7

Issue

  • How do I avoid impact to vsftpd from CVE-2014-3566?

Resolution

By default, SSL/TLS is not enabled for vsftpd. You may have configured vsftpd to enable SSL/TLS by adding the following line to /etc/vsftpd/vsftpd.conf

ssl_enable=YES

If SSL/TLS is enabled, add the following lines to /etc/vsftpd/vsftpd.conf in order to only allow usage of TLSv1, not SSLv2 or SSLv3:

ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO

Once complete, restart vsftpd:

# service vsftpd restart

Root Cause

A vulnerability was found in the SSLv3.0 protocol. This vulnerability allows a man-in-the-middle attacker to decrypt ciphertext using a padding oracle side-channel attack. For more information about this vulnerability, refer to the following article: POODLE: SSLv3.0 vulnerability (CVE-2014-3566)

Diagnostic Steps

For diagnostic steps, refer to the following article: POODLE: SSLv3.0 vulnerability (CVE-2014-3566)

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