CVE-2025-7071

Padding oracle attack vulnerability in Oberon microsystem AG’s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations.

CVSS

No CVSS.

References

Link	Resource
https://www.oberon.ch/security-advisories/cve-2025-7071/

Configurations

No configuration.

History

18 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Vulnerabilidad de ataque de oráculo de relleno en la biblioteca ocrypto de Oberon microsystem AG en todas las versiones desde la 3.1.0 y anteriores a la 3.9.2 permite a un atacante recuperar textos planos mediante mediciones de tiempo de operaciones de descifrado AES-CBC PKCS#7.

Information

Published : 2025-08-29 10:15

Updated : 2026-10-18 21:10

NVD link : CVE-2025-7071

Mitre link : CVE-2025-7071

CVE.ORG link : CVE-2025-7071

JSON object : View

Products Affected

No product.

CWE

CWE-208

Observable Timing Discrepancy

CWE-327

Use of a Broken or Risky Cryptographic Algorithm

{"id": "CVE-2025-7071", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-7071", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2025-08-29T12:07:50.804088Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "vulnerability@ncsc.ch", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.9, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "vulnerability@ncsc.ch", "affectedData": [{"vendor": "Oberon microsystems AG", "modules": ["AES-CBC with PKCS#7 padding"], "product": "ocrypto", "versions": [{"status": "affected", "version": "3.1.0", "versionType": "custom", "lessThanOrEqual": "3.9.1"}], "defaultStatus": "unaffected"}]}], "published": "2025-08-29T10:15:32.630", "references": [{"url": "https://www.oberon.ch/security-advisories/cve-2025-7071/", "source": "vulnerability@ncsc.ch"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "vulnerability@ncsc.ch", "description": [{"lang": "en", "value": "CWE-208"}, {"lang": "en", "value": "CWE-327"}]}], "descriptions": [{"lang": "en", "value": "Padding oracle attack vulnerability in Oberon microsystem AG\u2019s ocrypto library in all versions since 3.1.0 and prior to 3.9.2 allows an attacker to recover plaintexts via timing measurements of AES-CBC PKCS#7 decrypt operations."}, {"lang": "es", "value": "Vulnerabilidad de ataque de or\u00e1culo de relleno en la biblioteca ocrypto de Oberon microsystem AG en todas las versiones desde la 3.1.0 y anteriores a la 3.9.2 permite a un atacante recuperar textos planos mediante mediciones de tiempo de operaciones de descifrado AES-CBC PKCS#7."}], "lastModified": "2026-10-18T21:10:00.120", "sourceIdentifier": "vulnerability@ncsc.ch"}