Skip to content

Tesla Wall Connector bootloader bypasses the firmware downgrade ratchet

6.5 relevance
Score Breakdown
technical depth
9
novelty
8
actionability
2
community
8
strategic
4
personal
6

Scored daily by a customisable AI persona to surface the most relevant engineering leadership news.

Tesla Wall Connector bootloader bypass is a deep hardware security exploit.

Security synacktiv.com
Tesla Wall Connector bootloader bypasses the firmware downgrade ratchet
Summary

Tesla's anti-downgrade ratchet in Wall Connector Gen 3 firmware 24.44.3 was bypassed by abusing the order of operations in switch_to_new_firmware(): the partition table write occurs before slot erase, allowing a crafted firmware with a lower ratchet to pass validation. The attack, executed over UDS via the charge port, replayed the original Pwn2Own exploit chain. The ratchet is embedded in a VRS2 segment near 0x100000 and compared against a persistent storage value.