CVE-2020-36843
Vulnerability from cvelistv5
Published
2025-03-13 00:00
Modified
2025-03-18 16:22
Severity ?
EPSS score ?
Summary
The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.
References
Impacted products
Vendor | Product | Version | ||
---|---|---|---|---|
str4d | ed25519-java |
Version: 0 ≤ 0.3.0 |
{ "containers": { "adp": [ { "metrics": [ { "other": { "content": { "id": "CVE-2020-36843", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2025-03-18T16:22:00.551300Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2025-03-18T16:22:08.617Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" } ], "cna": { "affected": [ { "defaultStatus": "unknown", "product": "ed25519-java", "vendor": "str4d", "versions": [ { "lessThanOrEqual": "0.3.0", "status": "affected", "version": "0", "versionType": "semver" } ] } ], "descriptions": [ { "lang": "en", "value": "The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message." } ], "metrics": [ { "cvssV3_1": { "baseScore": 4.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N", "version": "3.1" } } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-347", "description": "CWE-347 Improper Verification of Cryptographic Signature", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2025-03-13T05:20:08.585Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre" }, "references": [ { "url": "https://github.com/str4d/ed25519-java/issues/82#issue-727629226" }, { "url": "https://eprint.iacr.org/2020/1244" } ], "x_generator": { "engine": "enrichogram 0.0.1" } } }, "cveMetadata": { "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2020-36843", "datePublished": "2025-03-13T00:00:00.000Z", "dateReserved": "2025-03-13T00:00:00.000Z", "dateUpdated": "2025-03-18T16:22:08.617Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "vulnerability-lookup:meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2020-36843\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2025-03-13T06:15:34.043\",\"lastModified\":\"2025-03-13T06:15:34.043\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.\"},{\"lang\":\"es\",\"value\":\"La implementaci\u00f3n de EdDSA en EdDSA-Java (tambi\u00e9n conocido como ed25519-java) hasta la versi\u00f3n 0.3.0 presenta maleabilidad de firmas y no cumple con la propiedad SUF-CMA (Fuerte Infalsificaci\u00f3n Existencial ante Ataques de Mensajes Elegidos). Esto permite a los atacantes crear nuevas firmas v\u00e1lidas, diferentes de las firmas previas, para un mensaje conocido.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.5,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-347\"}]}],\"references\":[{\"url\":\"https://eprint.iacr.org/2020/1244\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://github.com/str4d/ed25519-java/issues/82#issue-727629226\",\"source\":\"cve@mitre.org\"}]}}", "vulnrichment": { "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2020-36843\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-18T16:22:00.551300Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-18T16:22:04.608Z\"}}], \"cna\": {\"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"str4d\", \"product\": \"ed25519-java\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"0.3.0\"}], \"defaultStatus\": \"unknown\"}], \"references\": [{\"url\": \"https://github.com/str4d/ed25519-java/issues/82#issue-727629226\"}, {\"url\": \"https://eprint.iacr.org/2020/1244\"}], \"x_generator\": {\"engine\": \"enrichogram 0.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid signatures different from previous signatures for a known message.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-347\", \"description\": \"CWE-347 Improper Verification of Cryptographic Signature\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2025-03-13T05:20:08.585Z\"}}}", "cveMetadata": "{\"cveId\": \"CVE-2020-36843\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-03-18T16:22:08.617Z\", \"dateReserved\": \"2025-03-13T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2025-03-13T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}", "dataType": "CVE_RECORD", "dataVersion": "5.1" } } }
Loading…
Loading…
Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.