Suspicious Avaya Aura ACS Path Traversal to Admin Login via Semicolon Bypass (via webserver)

ATT&CK techniques

Initial Access

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

What it detects

This rule detects requests to the Avaya Aura ACS admin login path that use a semicolon path-segment traversal such as /acs/..;/admin/public/login.jsp to bypass access controls, seen alongside a reflected XSS via the error parameter. This pattern was used to reach protected admin functionality on the appliance. Detecting it surfaces access-control bypass attempts against Avaya Aura Device Services.

Reporting behind it

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Suspicious Avaya Aura ACS Path Traversal to Admin Login via Semicolon Bypass (via webserver)

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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