{"answers":{"affected":"2 open source packages ship an affected version, including jsrsasign. It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-14966 in the wild and no public exploit code.","fix":"Upgrade jsrsasign to 8.0.19 or later.","what":"CVE-2020-14966 is a high-severity vulnerability in n/a, published on 22 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-14966 and fix it if it is affected.\n\nWhat it is: CVE-2020-14966 is a high-severity vulnerability in n/a, published on 22 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-14966 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- jsrsasign (npm): affected from 4.0.0; fixed in 8.0.19\n- jsrsasign (npm): affected from 4.0.0; fixed in 8.0.19\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-14966/ (Markdown: https://insights.sbomify.com/CVE-2020-14966/index.md)","id":"CVE-2020-14966","markdown":"https://insights.sbomify.com/CVE-2020-14966/index.md","name":"CVE-2020-14966","record":{"aliases":["GHSA-p8c3-7rj8-q963"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js crypto library","requires_auth":"none","summary":"Attackers can create malleable ECDSA signatures that pass verification, potentially bypassing security checks in applications relying on canonical signatures.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"jsrsasign","vendor":"kjur"},{"product":"max_data","vendor":"netapp"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature"}],"description":"An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and '0' characters appended or prepended to an integer. The modified signatures are verified as valid. This could have a security-relevant impact if an application relied on a single canonical signature.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ECDSA signature validation vulnerability by accepting wrong ASN.1 encoding in jsrsasign","id":"CVE-2020-14966","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"other","year":"2020"},"n_packages":2,"n_references":6,"next":{"headline":"RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign","id":"CVE-2020-14967"},"packages":[{"ecosystem":"npm","fixed":["8.0.19"],"introduced":["4.0.0"],"last_affected":[],"package":"jsrsasign","purl":null,"source":"GHSA-p8c3-7rj8-q963"},{"ecosystem":"npm","fixed":["8.0.19"],"introduced":["4.0.0"],"last_affected":[],"package":"jsrsasign","purl":"pkg:npm/jsrsasign","source":"GHSA-p8c3-7rj8-q963"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2020-14965"},"products":["n/a"],"published":"2020-06-22","related":[{"cvss_score":9.8,"headline":"RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign","id":"CVE-2020-14967","kev_date_added":null,"published":"2020-06-22"},{"cvss_score":9.8,"headline":"RSA-PSS signature validation vulnerability by prepending zeros in jsrsasign","id":"CVE-2020-14968","kev_date_added":null,"published":"2020-06-22"},{"cvss_score":9.4,"headline":"jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction","id":"CVE-2026-4601","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":9.3,"headline":"jsrsasign: Incomplete Comparison Allows DSA Private Key Recovery via Biased Nonce Generation","id":"CVE-2026-4599","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":9.1,"headline":"jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic","id":"CVE-2026-4600","kev_date_added":null,"published":"2026-03-23"},{"cvss_score":9.1,"headline":"RSA signature validation vulnerability on maleable encoded message in jsrsasign","id":"CVE-2021-30246","kev_date_added":null,"published":"2021-04-07"},{"cvss_score":8.7,"headline":"jsrsasign is vulnerable to DoS through Infinite Loop when processing zero or negative inputs","id":"CVE-2026-4598","kev_date_added":null,"published":"2026-03-23"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can create malleable ECDSA signatures that pass verification, potentially bypassing security checks in applications relying on canonical signatures.","url":"https://insights.sbomify.com/CVE-2020-14966/"}