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RTT· red team

RTT · red team

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Techniques›AD Misconfigurations›AD CS ESC15

AD Misconfigurations

AD CS ESC15

T1649 · MITRE ATT&CK

AD CS vulnerability CVE-2024-49019 (ESC15, also called EKUwu) affects unpatched certificate authorities issuing from Version 1 certificate templates. A crafted certificate request can add Microsoft Application Policies (the szOID_APPLICATION_CERT_POLICIES extension, OID 1.3.6.1.4.1.311.21.10) that the CA incorrectly carries into an issued certificate even when they are not allowed by the template's configured EKUs. An attacker needs effective enrollment rights on a published V1 template and an unpatched issuing CA. Injected policies can include Client Authentication, Certificate Request Agent, or Code Signing. Impersonating another account additionally depends on subject/SAN control and the certificate-mapping rules of the target service; successful issuance or authentication does not itself elevate a local process.

ArtifactsRESTRICTED_ACCESS_BLUR_MARKER

Steps1

CategoryAD Certificate Abuse

Discuss in Advisor

Walkthrough

Step 1

RESTRICTED_ACCESS_BLUR_MARKER

RESTRICTED_ACCESS_BLUR_MARKER

Requirements: ALL(RESTRICTED_ACCESS_BLUR_MARKER)

Variant:

Full outcome coverage

ForgeCert · Create an authorized lab authentication certificate

Create an authorized lab authentication certificate

powershell

RESTRICTED_ACCESS_BLUR_MARKER

Version: RESTRICTED_ACCESS_BLUR_MARKER. Requirements: ALL(RESTRICTED_ACCESS_BLUR_MARKER)Documents all requested outcomes. This is a candidate, not proof of execution or compatibility.preconditions: RESTRICTED_ACCESS_BLUR_MARKERverification: RESTRICTED_ACCESS_BLUR_MARKERlimitations: RESTRICTED_ACCESS_BLUR_MARKER

RESTRICTED_ACCESS_BLUR_MARKER

Detection signal

Detection 01

RESTRICTED_ACCESS_BLUR_MARKER

Mitigations

Mitigation 01

RESTRICTED_ACCESS_BLUR_MARKER

OPSEC notes

RESTRICTED_ACCESS_BLUR_MARKER

References

Extended details

RESTRICTED_ACCESS_BLUR_MARKER