The Session Border Controller (SBC) must be configured to only process signaling packets whose integrity is validated.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-259930	SRG-VOIP-000500	SRG-VOIP-000500	SV-259930r948776_rule	2024-03-12	1

Description
The validation of signaling packet integrity is required to ensure the packet has not been altered in transit. Packets can be altered during uncontrollable network events, such as bit errors and packet truncation that would cause the packet to contain erroneous information. Packets containing detectable errors must not be processed. Packets can also be modified by a man-in-the-middle attack. The current Unified Capabilities Requirements (UCR) document specifies the hashing algorithm to be used during transmission.

Description

The validation of signaling packet integrity is required to ensure the packet has not been altered in transit. Packets can be altered during uncontrollable network events, such as bit errors and packet truncation that would cause the packet to contain erroneous information. Packets containing detectable errors must not be processed. Packets can also be modified by a man-in-the-middle attack. The current Unified Capabilities Requirements (UCR) document specifies the hashing algorithm to be used during transmission.

ℹ️ Check
Verify the DISN NIPRNet IPVS SBC is configured to only process signaling packets whose integrity is validated. Inspect the configurations of the EBC to determine compliance with the requirement. If the SBC does not validate the integrity of the received signaling packets, this is a finding. If the SBC is not configured to drop packets whose integrity is not validated, this is a finding. NOTE: The VVoIP system may allow SIP and SRTP traffic encrypted and encapsulated on port 443 from cloud service providers.

ℹ️ Check

Verify the DISN NIPRNet IPVS SBC is configured to only process signaling packets whose integrity is validated. Inspect the configurations of the EBC to determine compliance with the requirement. If the SBC does not validate the integrity of the received signaling packets, this is a finding. If the SBC is not configured to drop packets whose integrity is not validated, this is a finding. NOTE: The VVoIP system may allow SIP and SRTP traffic encrypted and encapsulated on port 443 from cloud service providers.

✔️ Fix
Ensure the DISN NIPRNet IPVS SBC is configured to only process signaling packets whose integrity is validated. The current UCR document specifies the hashing algorithm to be used during transmission. NOTE: The VVoIP system may allow SIP and SRTP traffic encrypted and encapsulated on port 443 from cloud service providers.