CVE-2023-4818

Summary

PAX A920 device allows to downgrade bootloader due to a bug in its version check. The signature is correctly checked and only bootloader signed by PAX can be used. 

The attacker must have physical USB access to the device in order to exploit this vulnerability.

Affected Software

Weaknesses

• CWE-74: CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

ADP Enrichment

CVE Program Container

Additional References

• https://ppn.paxengine.com/release/development
• https://blog.stmcyber.com/pax-pos-cves-2023/
• https://cert.pl/en/posts/2024/01/CVE-2023-4818/
• https://cert.pl/posts/2024/01/CVE-2023-4818/

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://ppn.paxengine.com/release/development
• https://blog.stmcyber.com/pax-pos-cves-2023/
• https://cert.pl/en/posts/2024/01/CVE-2023-4818/
• https://cert.pl/posts/2024/01/CVE-2023-4818/

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