{"id":"CVE-2023-4818","state":"PUBLISHED","title":"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. ","description":"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. \n\n\n\n\nThe attacker must have physical USB access to the device in order to exploit this vulnerability.","publishedAt":"2024-01-15T13:28:53.084Z","updatedAt":"2025-06-17T13:36:53.048Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"CERT-PL","products":["PAX Technology A920"],"affected":[{"vendor":"PAX Technology","product":"A920","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"A920_AP_Boot_Release_V5.14","versionType":"custom"}]}],"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/"],"weaknesses":["CWE-74"],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/4xxx/CVE-2023-4818.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-4818","state":"PUBLISHED","datePublished":"2024-01-15T13:28:53.084Z","dateUpdated":"2025-06-17T13:36:53.048Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2023-09-07T13:18:09.776Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"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. \n\n\n\n\nThe attacker must have physical USB access to the device in order to exploit this vulnerability."}],"affected":[{"vendor":"PAX Technology","product":"A920","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"A920_AP_Boot_Release_V5.14","versionType":"custom"}]}],"references":[{"url":"https://ppn.paxengine.com/release/development","tags":["vendor-advisory"]},{"url":"https://blog.stmcyber.com/pax-pos-cves-2023/","tags":["technical-description"]},{"url":"https://cert.pl/en/posts/2024/01/CVE-2023-4818/","tags":["third-party-advisory"]},{"url":"https://cert.pl/posts/2024/01/CVE-2023-4818/","tags":["third-party-advisory"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-74","description":"CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2024-10-10T15:36:00.867Z"},"credits":[{"lang":"en","type":"finder","user":"00000000-0000-4000-9000-000000000000","value":"Hubert Jasudowicz, Adam Kliś and other members of STM Cyber R&D team"}],"datePublic":"2024-01-15T11:00:00.000Z","impacts":[{"capecId":"CAPEC-176","descriptions":[{"lang":"en","value":"CAPEC-176 Configuration/Environment Manipulation"}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://ppn.paxengine.com/release/development","tags":["vendor-advisory","x_transferred"]},{"url":"https://blog.stmcyber.com/pax-pos-cves-2023/","tags":["technical-description","x_transferred"]},{"url":"https://cert.pl/en/posts/2024/01/CVE-2023-4818/","tags":["third-party-advisory","x_transferred"]},{"url":"https://cert.pl/posts/2024/01/CVE-2023-4818/","tags":["third-party-advisory","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T07:38:00.703Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":7.6,"attackVector":"PHYSICAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-06-17T13:36:16.229654Z","id":"CVE-2023-4818","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-06-17T13:36:53.048Z"}}]}}}