CVE-2024-6563
📋 TL;DR
A buffer overflow vulnerability in Renesas arm-trusted-firmware allows local attackers to execute arbitrary code by manipulating memory writes. This affects systems using Renesas R-Car platform firmware with vulnerable versions of the trusted firmware component. Attackers with local access can potentially gain elevated privileges or compromise system integrity.
💻 Affected Systems
- Renesas R-Car platform arm-trusted-firmware
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary code with firmware-level privileges, potentially bypassing security boundaries and establishing persistence.
Likely Case
Local privilege escalation allowing attacker to gain elevated system access, modify firmware components, or disrupt system operations.
If Mitigated
Limited impact if proper access controls restrict local user privileges and firmware integrity protections are in place.
🎯 Exploit Status
Exploitation requires local access and understanding of firmware memory layout. No public exploit code identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit 235f85b654a031f7647e81b86fc8e4ffeb430164
Vendor Advisory: https://asrg.io/security-advisories/cve-2024-6563/
Restart Required: Yes
Instructions:
1. Update arm-trusted-firmware to version containing commit 235f85b654a031f7647e81b86fc8e4ffeb430164
2. Rebuild firmware image
3. Flash updated firmware to affected devices
4. Reboot system to load patched firmware
🔧 Temporary Workarounds
Restrict local user access
linuxLimit local user privileges to reduce attack surface
Implement strict user access controls
Use principle of least privilege for local accounts
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Monitor systems for unusual firmware access or modification attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version and verify if io_rcar.c contains vulnerable code from line 313-318 in rcar_gen3_v2.5 branchCheck Version:
Check firmware version through platform-specific methods or examine firmware build informationVerify Fix Applied:
Verify firmware contains commit 235f85b654a031f7647e81b86fc8e4ffeb430164 in git history📡 Detection & Monitoring
Log Indicators:
- Unusual firmware access attempts
- Privilege escalation events
- Firmware modification logs
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Search for local privilege escalation events or firmware access anomalies on Renesas R-Car systems🔗 References
- https://asrg.io/security-advisories/cve-2024-6563/
- https://github.com/renesas-rcar/arm-trusted-firmware/commit/235f85b654a031f7647e81b86fc8e4ffeb430164
- https://asrg.io/security-advisories/cve-2024-6563/
- https://github.com/renesas-rcar/arm-trusted-firmware/commit/235f85b654a031f7647e81b86fc8e4ffeb430164
