CVE-2023-4818 (GCVE-0-2023-4818)
Vulnerability from cvelistv5 – Published: 2024-01-15 13:28 – Updated: 2025-06-17 13:36
VLAI
EPSS
VEX
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.
Severity
7.6 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-17 13:36 UTC
CWE
- CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
CERT-PL
CNA
References
4 references
| URL | Tags |
|---|---|
| https://ppn.paxengine.com/release/development | vendor-advisory |
| https://blog.stmcyber.com/pax-pos-cves-2023/ | technical-description |
| https://cert.pl/en/posts/2024/01/CVE-2023-4818/ | third-party-advisory |
| https://cert.pl/posts/2024/01/CVE-2023-4818/ | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| PAX Technology | A920 |
Affected:
0 , < A920_AP_Boot_Release_V5.14
(custom)
|
Date Public
2024-01-15 11:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T07:38:00.703Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://ppn.paxengine.com/release/development"
},
{
"tags": [
"technical-description",
"x_transferred"
],
"url": "https://blog.stmcyber.com/pax-pos-cves-2023/"
},
{
"tags": [
"third-party-advisory",
"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/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "PHYSICAL",
"availabilityImpact": "HIGH",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-4818",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-06-17T13:36:16.229654Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-06-17T13:36:53.048Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "A920",
"vendor": "PAX Technology",
"versions": [
{
"lessThan": "A920_AP_Boot_Release_V5.14",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Hubert Jasudowicz, Adam Kli\u015b and other members of STM Cyber R\u0026D team"
}
],
"datePublic": "2024-01-15T11:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cdiv\u003e\u003cspan style=\"background-color: rgba(221, 223, 228, 0.1);\"\u003ePAX 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.\u0026nbsp;\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgba(221, 223, 228, 0.1);\"\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003eThe attacker must have physical USB access to the device in order to exploit this vulnerability.\u003c/span\u003e\u003c/div\u003e"
}
],
"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.\u00a0\n\n\n\n\nThe attacker must have physical USB access to the device in order to exploit this vulnerability."
}
],
"impacts": [
{
"capecId": "CAPEC-176",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-176 Configuration/Environment Manipulation"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-74",
"description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-10-10T15:36:00.867Z",
"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
"shortName": "CERT-PL"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://ppn.paxengine.com/release/development"
},
{
"tags": [
"technical-description"
],
"url": "https://blog.stmcyber.com/pax-pos-cves-2023/"
},
{
"tags": [
"third-party-advisory"
],
"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/"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
"assignerShortName": "CERT-PL",
"cveId": "CVE-2023-4818",
"datePublished": "2024-01-15T13:28:53.084Z",
"dateReserved": "2023-09-07T13:18:09.776Z",
"dateUpdated": "2025-06-17T13:36:53.048Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T07:38:00.703Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"vendor-advisory",
"x_transferred"
],
"url": "https://ppn.paxengine.com/release/development"
},
{
"tags": [
"technical-description",
"x_transferred"
],
"url": "https://blog.stmcyber.com/pax-pos-cves-2023/"
},
{
"tags": [
"third-party-advisory",
"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/"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "PHYSICAL",
"availabilityImpact": "HIGH",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2023-4818",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-06-17T13:36:16.229654Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-06-17T13:36:45.510Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "A920",
"vendor": "PAX Technology",
"versions": [
{
"lessThan": "A920_AP_Boot_Release_V5.14",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"user": "00000000-0000-4000-9000-000000000000",
"value": "Hubert Jasudowicz, Adam Kli\u015b and other members of STM Cyber R\u0026D team"
}
],
"datePublic": "2024-01-15T11:00:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cdiv\u003e\u003cspan style=\"background-color: rgba(221, 223, 228, 0.1);\"\u003ePAX 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.\u0026nbsp;\u003c/span\u003e\u003c/div\u003e\u003cdiv\u003e\u003cspan style=\"background-color: rgba(221, 223, 228, 0.1);\"\u003e\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003eThe attacker must have physical USB access to the device in order to exploit this vulnerability.\u003c/span\u003e\u003c/div\u003e"
}
],
"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.\u00a0\n\n\n\n\nThe attacker must have physical USB access to the device in order to exploit this vulnerability."
}
],
"impacts": [
{
"capecId": "CAPEC-176",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-176 Configuration/Environment Manipulation"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-74",
"description": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-10-10T15:36:00.867Z",
"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
"shortName": "CERT-PL"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://ppn.paxengine.com/release/development"
},
{
"tags": [
"technical-description"
],
"url": "https://blog.stmcyber.com/pax-pos-cves-2023/"
},
{
"tags": [
"third-party-advisory"
],
"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/"
}
],
"source": {
"discovery": "UNKNOWN"
},
"x_generator": {
"engine": "Vulnogram 0.1.0-dev"
}
}
},
"cveMetadata": {
"assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
"assignerShortName": "CERT-PL",
"cveId": "CVE-2023-4818",
"datePublished": "2024-01-15T13:28:53.084Z",
"dateReserved": "2023-09-07T13:18:09.776Z",
"dateUpdated": "2025-06-17T13:36:53.048Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.