The designer will ensure web service design of critical functions is implemented using different algorithms to prevent similar attacks from forming a complete application level DoS.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-19691	APP3780	SV-21832r1_rule	DCSQ-1	Medium

Description
Denial of service attacks could occur if web services use the same algorithm for all critical features. An algorithm is defined as: an effective method expressed as a finite list of well-defined instructions. Combining a large array of varying, unrelated functionality into a single web service increases the chances that the service may become susceptible to a DoS attack which could affect not only the individual service, but the entire application as well.

Description

Denial of service attacks could occur if web services use the same algorithm for all critical features. An algorithm is defined as: an effective method expressed as a finite list of well-defined instructions. Combining a large array of varying, unrelated functionality into a single web service increases the chances that the service may become susceptible to a DoS attack which could affect not only the individual service, but the entire application as well.

STIG	Date
Application Security and Development Checklist	2014-12-22

Details

Check Text ( C-24088r1_chk )
Ask the application representative for the design document. Review the design document for web services. Review the design and verify web services have been implemented differently to prevent similar attacks from a complete DoS. For MAC I and MAC II systems: 1) If the design document does not exist or does not indicate web services have been implemented with different algorithms, this is a finding. For MAC III systems: 2) If the design document does not exist this is a finding.

Check Text ( C-24088r1_chk )

Ask the application representative for the design document. Review the design document for web services. Review the design and verify web services have been implemented differently to prevent similar attacks from a complete DoS.

For MAC I and MAC II systems:
1) If the design document does not exist or does not indicate web services have been implemented with different algorithms, this is a finding.

For MAC III systems:
2) If the design document does not exist this is a finding.

Fix Text (F-23044r1_fix)
Implement web service critical functions using different algorithms to prevent similar attacks from a complete application level DoS.