{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/206552?format=json","vulnerability_id":"VCID-wnuz-sw5s-wbdd","summary":"Improper Verification of Cryptographic Signature in starkbank-ecdsa","aliases":[{"alias":"CVE-2021-43572"},{"alias":"GHSA-92vm-mxjf-jqf3"},{"alias":"PYSEC-2021-426"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/17996?format=json","purl":"pkg:pypi/starkbank-ecdsa@2.0.1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@2.0.1"}],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/67490?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1"},{"url":"http://public2.vulnerablecode.io/api/packages/67491?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.1"},{"url":"http://public2.vulnerablecode.io/api/packages/67492?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.2","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.2"},{"url":"http://public2.vulnerablecode.io/api/packages/67493?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.3","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.3"},{"url":"http://public2.vulnerablecode.io/api/packages/67494?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.4","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.4"},{"url":"http://public2.vulnerablecode.io/api/packages/67495?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.5","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.5"},{"url":"http://public2.vulnerablecode.io/api/packages/67496?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.6","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.6"},{"url":"http://public2.vulnerablecode.io/api/packages/67497?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.7","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.7"},{"url":"http://public2.vulnerablecode.io/api/packages/67498?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.8","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.8"},{"url":"http://public2.vulnerablecode.io/api/packages/67499?format=json","purl":"pkg:pypi/starkbank-ecdsa@0.1.9","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@0.1.9"},{"url":"http://public2.vulnerablecode.io/api/packages/67500?format=json","purl":"pkg:pypi/starkbank-ecdsa@1.0.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@1.0.0"},{"url":"http://public2.vulnerablecode.io/api/packages/67501?format=json","purl":"pkg:pypi/starkbank-ecdsa@1.1.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@1.1.0"},{"url":"http://public2.vulnerablecode.io/api/packages/67502?format=json","purl":"pkg:pypi/starkbank-ecdsa@1.1.1","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@1.1.1"},{"url":"http://public2.vulnerablecode.io/api/packages/67503?format=json","purl":"pkg:pypi/starkbank-ecdsa@2.0.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-e9pe-mbyf-c3ft"},{"vulnerability":"VCID-wnuz-sw5s-wbdd"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:pypi/starkbank-ecdsa@2.0.0"}],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-43572","reference_id":"","reference_type":"","scores":[{"value":"0.00241","scoring_system":"epss","scoring_elements":"0.47764","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00241","scoring_system":"epss","scoring_elements":"0.47624","published_at":"2026-06-11T12:55:00Z"},{"value":"0.00241","scoring_system":"epss","scoring_elements":"0.4776","published_at":"2026-06-14T12:55:00Z"},{"value":"0.00241","scoring_system":"epss","scoring_elements":"0.4778","published_at":"2026-06-13T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-43572"},{"reference_url":"https://github.com/pypa/advisory-database/tree/main/vulns/starkbank-ecdsa/PYSEC-2021-426.yaml","reference_id":"","reference_type":"","scores":[{"value":"9.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/pypa/advisory-database/tree/main/vulns/starkbank-ecdsa/PYSEC-2021-426.yaml"},{"reference_url":"https://github.com/starkbank/ecdsa-python","reference_id":"","reference_type":"","scores":[{"value":"9.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/starkbank/ecdsa-python"},{"reference_url":"https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f","reference_id":"","reference_type":"","scores":[{"value":"9.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/starkbank/ecdsa-python/commit/d136170666e9510eb63c2572551805807bd4c17f"},{"reference_url":"https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1","reference_id":"","reference_type":"","scores":[{"value":"9.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/starkbank/ecdsa-python/releases/tag/v2.0.1"},{"reference_url":"https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries","reference_id":"","reference_type":"","scores":[{"value":"9.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries"},{"reference_url":"https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/","reference_id":"","reference_type":"","scores":[],"url":"https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43572","reference_id":"CVE-2021-43572","reference_type":"","scores":[{"value":"9.8","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"value":"CRITICAL","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43572"},{"reference_url":"https://github.com/advisories/GHSA-92vm-mxjf-jqf3","reference_id":"GHSA-92vm-mxjf-jqf3","reference_type":"","scores":[{"value":"CRITICAL","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-92vm-mxjf-jqf3"}],"weaknesses":[{"cwe_id":347,"name":"Improper Verification of Cryptographic Signature","description":"The product does not verify, or incorrectly verifies, the cryptographic signature for data."},{"cwe_id":937,"name":"OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013."},{"cwe_id":1035,"name":"OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017."}],"exploits":[],"severity_range_score":"9.0 - 10.0","exploitability":"0.5","weighted_severity":"9.0","risk_score":4.5,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-wnuz-sw5s-wbdd"}