Vincent Lenders

**Name of the Vulnerable Software and Affected Versions** TCAS II systems using transponders compliant with MOPS earlier than RTCA DO-181F **Description** The issue allows an attacker to impersonate a ground station and issue a Comm-A Identity Request. This action can set the Sensitivity Level Control (SLC) to the lowest setting and disable the Resolution Advisory (RA), leading to a denial-of-service condition. **Recommendations** For TCAS II systems using transponders compliant with MOPS earlier than RTCA DO-181F, consider disabling the Comm-A Identity Request feature until a patch or update is available to prevent an attacker from setting the SLC to the lowest setting and disabling the RA. Restrict access to the system to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** No specific software or versions are mentioned in the provided descriptions. **Description** The issue involves utilizing software-defined radios and a custom low-latency processing pipeline to transmit RF signals with spoofed location data to aircraft targets. This can cause the appearance of fake aircraft on displays and potentially trigger undesired Resolution Advisories (RAs). **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.