CVE-2023-7346

# Conceptual PoC for demonstrating the vulnerability context # This script checks the version and simulates the logic error scenario # Note: Actual exploitation requires specific miniscript crafting. def check_vulnerability(app_version): # Affected versions are 2.1.0 and 2.1.1 vulnerable_versions = ["2.1.0", "2.1.1"] if app_version in vulnerable_versions: return True return False def simulate_malicious_policy(): # Example of a miniscript policy fragment that might cause issues # The 'a:' fragment handling is the root cause malicious_policy = "a:pk(key)" # Simplified representation print(f"Crafting malicious policy: {malicious_policy}") # In a real scenario, this would be sent to the device return malicious_policy if __name__ == "__main__": version = "2.1.0" if check_vulnerability(version): print(f"Device is vulnerable (Version: {version})") policy = simulate_malicious_policy() print("Attempting to derive address on device...") print("WARNING: Device may display incorrect address!") else: print("Device is not vulnerable.")

{"cve": {"id": "CVE-2023-7346", "sourceIdentifier": "[email protected]", "published": "2026-05-20T16:16:23.770", "lastModified": "2026-05-20T17:33:05.830", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Ledger Bitcoin app versions 2.1.0 and 2.1.1 contain an address derivation vulnerability that allows attackers to cause incorrect Bitcoin addresses to be displayed by exploiting improper handling of miniscript policies containing the a: fragment. Attackers can craft malicious miniscript policies that cause the device to derive and display incorrect receiving addresses, potentially leading to funds being sent to unintended addresses."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:P/AC:H/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 4.1, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N", "baseScore": 4.0, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.4, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-682"}]}], "references": [{"url": "https://donjon.ledger.com/lsb/019/", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/ledger-bitcoin-app-address-derivation-error-via-miniscript", "source": "[email protected]"}]}}