STIGQter: STIG Summary: Enterprise Voice, Video, and Messaging Policy Security Requirements Guide Version: 1 Release: 4 Benchmark Date: 05 Jan 2026:

The Session Border Controller (SBC) must be configured to manage IP port pinholes for the SRTP/SRTCP bearer streams based on the information in the SIP and AS-SIP messages.

DISA Rule

SV-259933r948779_rule

Vulnerability Number

V-259933

Group Title

SRG-VOIP-000530

Rule Version

SRG-VOIP-000530

Severity

CAT II

CCI(s)

• CCI-001548 - Defines the information flow control policies for controlling the flow of information within the system.

Weight

10

Fix Recommendation

Ensure the DISN NIPRNet IPVS SBC is configured to manage IP port pinholes for the SRTP/SRTCP bearer streams based on the information in the SIP and AS-SIP messages as follows:
- Opens specific IP port pinholes on a per session basis for the SRTP/SRTCP bearer streams as negotiated by the communicating endpoints through the LSC and MFSS.
- Closes the specifically opened IP port pinholes when the session is to be torn down.

NOTE: The VVoIP system may allow SIP and SRTP traffic encrypted and encapsulated on port 443 from cloud service providers.

Check Contents

Verify the DISN NIPRNet IPVS SBC is configured to manage IP port pinholes for the SRTP/SRTCP bearer streams based on the information in the SIP and AS-SIP messages as follows:
- Opens specific IP port pinholes on a per session basis for the SRTP/SRTCP bearer streams as negotiated by the communicating endpoints through the Local Session Controller (LSC) and Multifunction Soft Switch (MFSS).
- Closes the specifically opened IP port pinholes when the session is to be torn down.

Inspect the configurations of the EBC to determine compliance with the requirement.

If the SBC is not configured to open the specifically negotiated IP ports for the SRTP/SRTCP bearer streams on an individual session basis, this is a finding.

If the SBC is not configured to close specifically negotiated IP ports for the SRTP/SRTCP bearer streams on an individual session basis, this is a finding.

NOTE: The VVoIP system may allow SIP and SRTP traffic encrypted and encapsulated on port 443 from cloud service providers.

Vulnerability Number

V-259933

Documentable

False

Rule Version

SRG-VOIP-000530

Severity Override Guidance

Verify the DISN NIPRNet IPVS SBC is configured to manage IP port pinholes for the SRTP/SRTCP bearer streams based on the information in the SIP and AS-SIP messages as follows:
- Opens specific IP port pinholes on a per session basis for the SRTP/SRTCP bearer streams as negotiated by the communicating endpoints through the Local Session Controller (LSC) and Multifunction Soft Switch (MFSS).
- Closes the specifically opened IP port pinholes when the session is to be torn down.

Inspect the configurations of the EBC to determine compliance with the requirement.

If the SBC is not configured to open the specifically negotiated IP ports for the SRTP/SRTCP bearer streams on an individual session basis, this is a finding.

If the SBC is not configured to close specifically negotiated IP ports for the SRTP/SRTCP bearer streams on an individual session basis, this is a finding.

NOTE: The VVoIP system may allow SIP and SRTP traffic encrypted and encapsulated on port 443 from cloud service providers.

Check Content Reference

M

Target Key

5585