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Improper Verification of Cryptographic Signature

CVE-2020-29438

Medium
6.5/10

Summary

Tesla Model X vehicles before 2020-11-23 have key fobs that accept firmware updates without signature verification. This allows attackers to construct firmware that retrieves an unlock code from a secure enclave chip.

  • LOW
  • ADJACENT_NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • NONE

CWE-347 - Improper Verification of Cryptographic Signature

A cryptographic protocol is meant to ensure that services are provided in a secure manner. An application with absent or improper verification of cryptographic signatures allows malicious users to feed false messages to valid users or to disclose sensitive data, subverting the goals of the protocol. This can lead to security failures such as false authentication, account hijacking, and privilege escalation.

References

Advisory Timeline

  • Published