Rule version SRG-APP-000555-UEM-000393 · STIG v2 · 2026-08-31
Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session.
Remote access is access to DoW 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 use of a symmetric key block cipher algorithm to provide an information service, such as confidentiality or authentication.
AES is the FIPS-validated cipher block cryptographic algorithm approved for use in DoW. For an algorithm implementation to be listed on a FIPS 140-3 cryptographic module validation certificate as an approved security function, the algorithm implementation must meet all the requirements of FIPS 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.
This requirement also applies to Zero Trust initiatives.
Satisfies:FCS_COP.1.1, FTP_TRP.1.1 Reference:PP-MDM-505300
Verify FIPS 140-3 mode has been implemented on the UEM server for all server and agent encryption.
If FIPS 140-3 mode has not been implemented on the UEM server for all server and agent encryption, this is a finding.
Configure the UEM server to implement FIPS 140-3 mode for all server and agent encryption.