| Finding ID |
Severity |
Title |
Description |
|
V-266287
|
High |
The F5 BIG-IP appliance IPsec VPN must be configured to use FIPS-validated SHA-2 or higher for Internet Key Exchange (IKE). |
Without cryptographic integrity protections, information can be altered by unauthorized users without detection.
Although allowed by SP800-131Ar2 for some applications, SHA-1 is considered a compromised hashing standard and is being phased out of use by industry and government standards. Unless required for legacy use, DOD systems must not be configured... |
|
V-266286
|
High |
The F5 BIG-IP appliance IPsec VPN must use cryptographic algorithms approved by NSA to protect NSS when transporting classified traffic across an unclassified network. |
Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The VPN gateway must implement cryptographic modules adhering to the higher standards approved by the federal government since this provides assurance they have been tested and validated.
NIST cryptographic algorithms approved by NSA to... |
|
V-266285
|
High |
For accounts using password authentication, the F5 BIG-IP appliance site-to-site IPsec VPN Gateway must use SHA-2 or later protocol to protect the integrity of the password authentication process. |
Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Use of passwords for authentication is intended only for limited situations and must not be used as... |
|
V-266281
|
High |
The F5 BIG-IP appliance IPsec VPN Gateway must use Internet Key Exchange (IKE) for IPsec VPN Security Associations (SAs). |
Without IKE, the SPI is manually specified for each security association. IKE peers will negotiate the encryption algorithm and authentication or hashing methods as well as generate the encryption keys.
An IPsec SA is established using either IKE or manual configuration. When using IKE, the security associations are established when... |
|
V-266280
|
High |
The F5 BIG-IP appliance IPsec VPN must ensure inbound and outbound traffic is configured with a security policy. |
Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth and other resources.
VPN traffic received from another enclave with different security policy or level of trust must not bypass be inspected... |
|
V-266279
|
High |
The F5 BIG-IP appliance IPsec VPN must use AES256 or greater encryption for the IPsec proposal. |
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.
A block cipher mode is an algorithm that features the... |
|
V-266278
|
High |
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. |
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... |
|
V-266277
|
High |
The F5 BIG-IP appliance must be configured to use a Diffie-Hellman (DH) Group of 16 or greater for Internet Key Exchange (IKE) Phase 1. |
NIST cryptographic algorithms approved by NSA to protect NSS. Based on an analysis of the impact of quantum computing, cryptographic algorithms specified by CNSSP-15 and approved for use in products in the CSfC program, the approved algorithms have been changed to more stringent protocols configure with increased bit sizes and... |
|
V-266288
|
Medium |
The F5 BIG-IP appliance IPsec VPN Gateway must specify Perfect Forward Secrecy (PFS) during Internet Key Exchange (IKE) negotiation. |
PFS generates each new encryption key independently from the previous key. Without PFS, compromise of one key will compromise all communications.
The phase 2 (Quick Mode) Security Association (SA) is used to create an IPsec session key. Hence, its rekey or key regeneration procedure is very important. The phase 2... |
|
V-266284
|
Medium |
The F5 BIG-IP appliance IPsec VPN must renegotiate the IKE Phase 2 security association after eight hours or less. |
When a VPN gateway creates an IPsec Security Association (SA), resources must be allocated to maintain the SA. These resources are wasted during periods of IPsec endpoint inactivity, which could result in the gateway’s inability to create new SAs for other endpoints, thereby preventing new sessions from connecting. The Internet... |
|
V-266283
|
Medium |
The F5 BIG-IP appliance IPsec VPN Gateway must renegotiate the IPsec Phase 1 security association after eight hours or less. |
The IPsec security association (SA) and its corresponding key will expire either after the number of seconds or amount of traffic volume has exceeded the configured limit. A new SA is negotiated before the lifetime threshold of the existing SA is reached to ensure that a new SA is ready... |
|
V-266282
|
Medium |
The IPsec BIG-IP appliance must use IKEv2 for IPsec VPN security associations. |
To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types); organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems.
Use of IKEv2 leverages denial of service (DoS) protections because of improved bandwidth management... |