CHAIN-178 — Update Management exclusions for prod hosts

Summary

Severity: Medium · Likelihood: High · Logic: ALL

Why this chain matters

Prod hosts are excluded from Update Management schedules to 'avoid outage risk'. They accumulate critical CVEs for months. One in-the-wild exploit yields fleet-wide compromise because the patches were deliberately skipped.

Component rules

This chain fires when its trigger conditions are met by the following rules. Click any rule to see its detection logic and compliance mappings.

Rule ID	Role
zt_bak_005	Trigger
zt_wl_008	Trigger

Attack walkthrough

Step 1 — High-impact CVE with public exploit.

Actor: CVE publication
MITRE ATT&CK: T1190
Enabled by: zt_bak_005

Attacker gain: Exploit for stale prod hosts.

Step 2 — Attack unpatched fleet; every excluded host is vulnerable.

Actor: Attacker
MITRE ATT&CK: T1210
Enabled by: zt_wl_008

Attacker gain: Fleet compromise.

Blast radius

Initial access	Public exploit + excluded hosts.
Max privilege	RCE on prod fleet.
Data at risk	Prod workload data
Services at risk	Every excluded host

How the logic works

The chain fires only when every rule above has at least one finding in the current scan. Missing any one rule breaks the chain — so remediating any single step disrupts the attack path.