The F5 BIG-IP appliance IPsec VPN Gateway must use AES256 or higher encryption for the Internet Key Exchange (IKE) proposal to protect confidentiality of remote access sessions.
An XCCDF Rule
Description
<VulnDiscussion>Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. AES is the FIPS-validated cipher block cryptographic algorithm approved for use in DOD. For an algorithm implementation to be listed on a FIPS 140-2/140-3 cryptographic module validation certificate as an approved security function, the algorithm implementation must meet all the requirements of FIPS 140-2/140-3 and must successfully complete the cryptographic algorithm validation process. Currently, NIST has approved the following confidentiality modes to be used with approved block ciphers in a series of special publications: ECB, CBC, OFB, CFB, CTR, XTS-AES, FF1, FF3, CCM, GCM, KW, KWP, and TKW.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-266278r1024913_rule
- Severity
- High
- References
- Updated
Remediation - Manual Procedure
From the BIG-IP GUI:
1. Network.
2. IPsec.
3. IKE Peers.
4. Click on the Name of the IKE peer.
5. Configure an AES256 encryption algorithm under IKE Phase 1 Algorithms >> Encryption Algorithm.