TianoCore EDK2: PXE driver remote code execution
A vulnerability in the TianoCore EDK2 PXE driver enables a remote, unauthenticated attacker to execute arbitrary code with Ring-0 privileges or trigger a denial-of-service condition.
Triage facts
Revision 1- Applicability
- EDK2
- Evidence
- Unknown
- Severity
- High
- Action
- Elevated
- Sources
- 1 public source
- Freshness
- Revision 1Oct 23, 15:01 UTC
- Source quality
- A3Roughly even chance
A vulnerability has been identified in the TianoCore EDK2 PXE driver. A remote, unauthenticated attacker can exploit this flaw to execute arbitrary code with Ring-0 privileges or cause a denial-of-service state. Details regarding the specific vulnerability mechanism and the affected version range remain limited; users are advised to monitor the official TianoCore EDK2 project resources for upcoming security patches.
Impact
Successful exploitation allows for arbitrary code execution at the highest privilege level (Ring-0) on affected firmware, potentially leading to persistent system compromise or system instability via a denial-of-service condition.
Recommendation
- Identify systems utilizing TianoCore EDK2 firmware, particularly those utilizing PXE for network booting.
- Monitor the official TianoCore EDK2 project security announcements for patch availability and apply firmware updates as soon as they are released.
- Implement network-level access controls to restrict access to PXE booting services to authorized management segments only.
Immediate actions
Inventory all systems and firmware versions running TianoCore EDK2 to prepare for upcoming patches.
Threat Hunt
Monitor network traffic for anomalous PXE/TFTP requests originating from unauthorized segments.
Data: Network flow logs or PCAP
Mitigations
Restrict PXE boot server access to management-only VLANs to prevent remote exploitation.
Network-based remote code execution via PXE