{"answers":{"affected":"2 open source packages ship an affected version, including jsrsasign. It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-14967 in the wild and no public exploit code.","fix":"Upgrade jsrsasign to 8.0.18 or later.","what":"CVE-2020-14967 is a critical memory corruption 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-2020-14967 and fix it if it is affected.\n\nWhat it is: CVE-2020-14967 is a critical memory corruption 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-2020-14967 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- jsrsasign (npm): affected all versions; fixed in 8.0.18\n- jsrsasign (npm): affected all versions; fixed in 8.0.18\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-2020-14967/ (Markdown: https://insights.sbomify.com/CVE-2020-14967/index.md)","id":"CVE-2020-14967","markdown":"https://insights.sbomify.com/CVE-2020-14967/index.md","name":"CVE-2020-14967","record":{"aliases":["GHSA-xxxq-chmp-67g4"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js crypto library","requires_auth":"none","summary":"An attacker can trigger memory corruption in the jsrsasign library by prepending null bytes to RSA ciphertexts, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"jsrsasign","vendor":"kjur"},{"product":"max_data","vendor":"netapp"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"An issue was discovered in the jsrsasign package before 8.0.18 for Node.js. Its RSA PKCS1 v1.5 decryption implementation does not detect ciphertext modification by prepending '\\0' bytes to ciphertexts (it decrypts modified ciphertexts without error). An attacker might prepend these bytes with the goal of triggering memory corruption issues.","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":"RSA PKCS#1 decryption vulnerability with prepending zeros in jsrsasign","id":"CVE-2020-14967","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"memory_corruption","year":"2020"},"n_packages":2,"n_references":6,"next":{"headline":"RSA-PSS signature validation vulnerability by prepending zeros in jsrsasign","id":"CVE-2020-14968"},"packages":[{"ecosystem":"npm","fixed":["8.0.18"],"introduced":["0"],"last_affected":[],"package":"jsrsasign","purl":null,"source":"GHSA-xxxq-chmp-67g4"},{"ecosystem":"npm","fixed":["8.0.18"],"introduced":["0"],"last_affected":[],"package":"jsrsasign","purl":"pkg:npm/jsrsasign","source":"GHSA-xxxq-chmp-67g4"}],"prev":{"headline":"ECDSA signature validation vulnerability by accepting wrong ASN.1 encoding in jsrsasign","id":"CVE-2020-14966"},"products":["n/a"],"published":"2020-06-22","related":[{"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":"An attacker can trigger memory corruption in the jsrsasign library by prepending null bytes to RSA ciphertexts, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2020-14967/"}