SC-17 Public key infrastructure certificates
What the standard requires
a. Issue public key certificates under an [certificate policy] or obtain public key certificates from an approved service provider; and b. Include only approved trust anchors in trust stores or certificate stores managed by the organization.
Quoted verbatim from NIST SP 800-53 Rev 5 (OSCAL catalog), which is in the public domain.
Cross-framework mappings
No cross-framework mapping is seeded for this control. That is stated rather than filled in: a mapping nobody authored is worse than a gap you can see.
Track SC-17 with evidence behind it
In CMDash this control is a row with an owner, a status, uploaded evidence kept with its full history, and an export an assessor can read.