Security Alerts, Advisories, and Directives SI-5

System and Information Integrity · Low baseline ✗ Not implemented

Status — program-wide

What references this control

No risks name this control in their Framework field yet.

No policies reference it yet.

Link a risk or policy to this control

Attaching adds SI-5 to the item's Framework field; the ✨ AI button suggests the best match. You can also edit the Framework field on a risk / policy directly.

Source: NIST SP 800-53 Rev.5, System and Information Integrity family NIST SP 800-53 Rev.5. The baseline shows the lowest SP 800-53B baseline (Low / Moderate / High) this control appears in NIST SP 800-53B.

Control guide — plain-English, per NIST SP 800-53

SI-5 (Security Alerts, Advisories, and Directives) is about staying plugged in to the outside world so you hear about new threats and required fixes in time to act. You receive alerts from trusted sources, pass them to the right people inside, and carry out any directives on a set clock. It is mostly a process control with a few technical hooks on the server itself. It sits in the Low baseline.

What good looks like

Subscribe to trusted alert sources — your Linux distribution’s security-announce list, and a national feed such as CISA (Cybersecurity and Infrastructure Security Agency).
Route incoming alerts to the person who can act on them, so a notice does not sit unread in a shared inbox.
Generate your own internal notices when you find something that affects your systems, so the team hears it too.
Act on directives within a set time frame — decide how fast a ‘critical’ fix must land (for example, seven days) and write that down.
On the server, make security patches easy to catch with tools like apt list --upgradable or unattended-upgrades for the security pocket.

Framework mapping

NIST CSF 2.0 — ID.RA-02 — Cyber threat intelligence is received from information sharing forums and sources

How to move it toward Implemented

Subscribe the team to the distribution security list and CISA alerts, and note the subscription addresses in your SI procedures.
Enable unattended-upgrades for security updates (dpkg-reconfigure -plow unattended-upgrades) so advisories about patched packages are acted on automatically, and keep the record in /var/log/unattended-upgrades/.
Write a one-line rule for how quickly critical directives must be applied, and keep a short dated log of alerts received and what you did.
Attach that alert log and the subscription list as hardening evidence on the asset, naming SI-5 in the Requirement field — that moves it from ‘To assess’ toward ‘Completed’.