Symantec ProxySG providing intermediary services for FTP must inspect outbound FTP communications traffic for protocol compliance and protocol anomalies.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-94265	SYMP-AG-000250	SV-104219r1_rule		Medium

Description
Application protocol anomaly detection examines application layer protocols such as FTP to identify attacks based on observed deviations in the normal RFC behavior of a protocol or service. This type of monitoring allows for the detection of known and unknown exploits that exploit weaknesses of commonly used protocols. Since protocol anomaly analysis examines the application payload for patterns or anomalies, an FTP proxy must be included in the ALG. This ALG will be configured to inspect inbound and outbound FTP communications traffic to detect protocol anomalies such as malformed message and command insertion attacks.

Description

Application protocol anomaly detection examines application layer protocols such as FTP to identify attacks based on observed deviations in the normal RFC behavior of a protocol or service. This type of monitoring allows for the detection of known and unknown exploits that exploit weaknesses of commonly used protocols. Since protocol anomaly analysis examines the application payload for patterns or anomalies, an FTP proxy must be included in the ALG. This ALG will be configured to inspect inbound and outbound FTP communications traffic to detect protocol anomalies such as malformed message and command insertion attacks.

STIG	Date
Symantec ProxySG ALG Security Technical Implementation Guide	2020-03-27

Details

Check Text ( C-93451r1_chk )
Determine whether FTP proxying is enabled to provide inspection. 1. Log on to the Web Management Console. 2. Browse to Configuration >> Services >> Proxy Services. 3. Click the "Standard", "Predefined Service Group" and verify that the FTP service is set to "Intercept". If Symantec ProxySG providing intermediary services for FTP does not inspect outbound FTP communications traffic for protocol compliance and protocol anomalies, this is a finding.

Check Text ( C-93451r1_chk )

Determine whether FTP proxying is enabled to provide inspection.

1. Log on to the Web Management Console.
2. Browse to Configuration >> Services >> Proxy Services.
3. Click the "Standard", "Predefined Service Group" and verify that the FTP service is set to "Intercept".

If Symantec ProxySG providing intermediary services for FTP does not inspect outbound FTP communications traffic for protocol compliance and protocol anomalies, this is a finding.

Fix Text (F-100381r1_fix)
Enable outbound FTP proxying to inspect this traffic for compliance and anomalies. 1. Log on to the Web Management Console. 2. Browse to Configuration >> Services >> Proxy Services. 3. Click the "Standard", "Predefined Service Group" and set FTP service to "Intercept". 4. Click "Apply".