CVE-2017-11424

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2017-06-22T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2017-11-03T18:57:01.000Z", "orgId": "7cd4c57f-0a88-4dda-be53-70336b413766", "shortName": "duo"}, "references": [{"name": "DSA-3979", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "http://www.debian.org/security/2017/dsa-3979"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/jpadilla/pyjwt/pull/277"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@duo.com", "ID": "CVE-2017-11424", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "DSA-3979", "refsource": "DEBIAN", "url": "http://www.debian.org/security/2017/dsa-3979"}, {"name": "https://github.com/jpadilla/pyjwt/pull/277", "refsource": "CONFIRM", "url": "https://github.com/jpadilla/pyjwt/pull/277"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T18:12:39.550Z"}, "title": "CVE Program Container", "references": [{"name": "DSA-3979", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "http://www.debian.org/security/2017/dsa-3979"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/jpadilla/pyjwt/pull/277"}]}]}, "cveMetadata": {"assignerOrgId": "7cd4c57f-0a88-4dda-be53-70336b413766", "assignerShortName": "duo", "cveId": "CVE-2017-11424", "datePublished": "2017-08-24T16:00:00.000Z", "dateReserved": "2017-07-18T00:00:00.000Z", "dateUpdated": "2024-08-05T18:12:39.550Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "security@duo.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:pyjwt_project:pyjwt:*:*:*:*:*:*:*:*", "matchCriteriaId": "2ED2491D-3EA6-4348-BABC-A1752F717260", "versionEndIncluding": "1.5.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch."}, {"lang": "es", "value": "En PyJWT 1.5.0 y anteriores, la comprobaci\u00f3n `invalid_strings` en `HMACAlgorithm.prepare_key` no da cuenta de todas las claves p\u00fablicas codificadas PEM. Espec\u00edficamente, el formato codificado PKCS1 PEM se permitir\u00eda porque va precedido por la cadena `-----BEGIN RSA PUBLIC KEY-----`, la cual no se tiene en cuenta. Esto permite ataques sim\u00e9tricos/asim\u00e9tricos de confusi\u00f3n de claves contra usuarios que empleen las claves p\u00fablicas PKCS1 PEM, que permitir\u00edan que un atacante manipulase JWT desde cero."}], "id": "CVE-2017-11424", "lastModified": "2026-06-17T01:01:47.717", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-08-24T16:29:00.197", "references": [{"source": "security@duo.com", "tags": ["Third Party Advisory"], "url": "http://www.debian.org/security/2017/dsa-3979"}, {"source": "security@duo.com", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/jpadilla/pyjwt/pull/277"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.debian.org/security/2017/dsa-3979"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://github.com/jpadilla/pyjwt/pull/277"}], "sourceIdentifier": "security@duo.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "python-jwt: Incorrect handling of PEM-encoded public keys", "id": "1482529", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1482529"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "status": "draft"}, "details": ["In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch."], "name": "CVE-2017-11424", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "python-jwt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:storage:3", "fix_state": "Will not fix", "package_name": "python-jwt", "product_name": "Red Hat Storage 3"}], "public_date": "2017-06-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-11424\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-11424"], "threat_severity": "Moderate"}

{}