{"id":"CVE-2025-7071","state":"PUBLISHED","title":"Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library","description":"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.","publishedAt":"2025-08-29T09:18:06.911Z","updatedAt":"2025-08-29T12:07:57.827Z","severity":{"score":5.9,"label":"Medium","version":"4.0","vector":"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","source":"NCSC.ch"},"assigner":"NCSC.ch","products":["Oberon microsystems AG ocrypto"],"affected":[{"vendor":"Oberon microsystems AG","product":"ocrypto","defaultStatus":"unaffected","versions":[{"version":"3.1.0","status":"affected","lessThanOrEqual":"3.9.1","versionType":"custom"}],"modules":["AES-CBC with PKCS#7 padding"]}],"references":["https://www.oberon.ch/security-advisories/cve-2025-7071/"],"weaknesses":["CWE-208","CWE-327"],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/7xxx/CVE-2025-7071.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-7071","state":"PUBLISHED","datePublished":"2025-08-29T09:18:06.911Z","dateUpdated":"2025-08-29T12:07:57.827Z","assignerShortName":"NCSC.ch","assignerOrgId":"455daabc-a392-441d-aa46-37d35189897c","dateReserved":"2025-07-04T14:16:55.641Z"},"containers":{"cna":{"title":"Timing side-channel vulnerability in AES-CBC decryption with PKCS#7 padding in ocrypto library","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Oberon microsystems AG","product":"ocrypto","defaultStatus":"unaffected","versions":[{"version":"3.1.0","status":"affected","lessThanOrEqual":"3.9.1","versionType":"custom"}],"modules":["AES-CBC with PKCS#7 padding"]}],"references":[{"url":"https://www.oberon.ch/security-advisories/cve-2025-7071/"}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":5.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-208","description":"CWE-208 Observable Timing Discrepancy","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-327","description":"CWE-327 Use of a Broken or Risky Cryptographic Algorithm","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"NCSC.ch","orgId":"455daabc-a392-441d-aa46-37d35189897c","dateUpdated":"2025-08-29T09:18:06.911Z"},"impacts":[{"capecId":"CAPEC-463","descriptions":[{"lang":"en","value":"CAPEC-463 Padding Oracle Crypto Attack"}]}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Affected users should upgrade to <i>ocrypto 3.9.2</i> or later."}],"value":"Affected users should upgrade to ocrypto 3.9.2 or later."}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-29T12:07:50.804088Z","id":"CVE-2025-7071","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":"2025-08-29T12:07:57.827Z"}}]}}}