Possible IngressNightmare Exploitation via NGINX Loading Shared Object From Proc (CVE-2025-1974)

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
- T1610Deploy Container
Persistence
Priv Esc
Defense Evasion
- T1610Deploy Container
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects an NGINX worker loading a shared object from the /proc filesystem, the exploitation primitive of IngressNightmare where an injected ssl_engine directive points at a file descriptor under /proc. It is important because this yields unauthenticated remote code execution inside the ingress-nginx admission controller.

Reporting behind it

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Possible IngressNightmare Exploitation via NGINX Loading Shared Object From Proc (CVE-2025-1974)

Pivot detection · T1190 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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