CVE-2020-29440 Vulnerability Analysis & Exploit Details

Status: Analyzed - Last modified: 04 Dec 2020, 19:30 UTC Published: 30 Nov 2020, 22:15 UTC

CVE-2020-29440
Vulnerability Scoring

4.6
/10

Attack Complexity Details

  • Attack Complexity: Low Impact
  • Attack Vector: PHYSICAL
  • Privileges Required: None
  • Scope: UNCHANGED
  • User Interaction: NONE

CIA Impact Definition

  • Confidentiality:
  • Integrity: HIGH IMPACT
  • Availability:

CVE-2020-29440 Vulnerability Summary

Tesla Model X vehicles before 2020-11-23 do not perform certificate validation during an attempt to pair a new key fob with the body control module (BCM). This allows an attacker (who is inside a vehicle, or is otherwise able to send data over the CAN bus) to start and drive the vehicle with a spoofed key fob.

Access Complexity Graph

Above is the Access Complexity Graph for CVE-2020-29440. It helps visualize the difficulty level and privilege requirements needed to exploit this vulnerability, providing a quick assessment of its exploitation feasibility.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2020-29440, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

Impact Analysis

Below is the Impact Analysis for CVE-2020-29440, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.058% (probability of exploit)

EPSS Percentile: 26.95% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 73.05% of others.

CVE-2020-29440 Detailed Information and External References

References

CWE

CWE-295

CAPEC

  • Creating a Rogue Certification Authority Certificate CAPEC-459 An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
  • Signature Spoofing by Improper Validation CAPEC-475 An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

Vulnerable Configurations

  • cpe:2.3:o:tesla:model_x_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:tesla:model_x_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:tesla:model_x_firmware:2022.16.0.3:*:*:*:*:*:*:*
    cpe:2.3:o:tesla:model_x_firmware:2022.16.0.3:*:*:*:*:*:*:*
  • cpe:2.3:h:tesla:model_x:-:*:*:*:*:*:*:*
    cpe:2.3:h:tesla:model_x:-:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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