{"answers":{"affected":"2 open source packages ship an affected version, including ecdsa-elixir. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-43568 in the wild and no public exploit code.","fix":"Upgrade ecdsa-elixir to 1.0.1 or later.","what":"CVE-2021-43568 is a critical vulnerability in n/a, published on 9 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-43568 and fix it if it is affected.\n\nWhat it is: CVE-2021-43568 is a critical vulnerability in n/a, published on 9 Nov 2021. 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-2021-43568 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ecdsa-elixir (Hex): affected from 1.0.0; fixed in 1.0.1\n- ecdsa-elixir (Hex): affected from 1.0.0; fixed in 1.0.1\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-2021-43568/ (Markdown: https://insights.sbomify.com/CVE-2021-43568/index.md)","id":"CVE-2021-43568","markdown":"https://insights.sbomify.com/CVE-2021-43568/index.md","name":"CVE-2021-43568","record":{"aliases":["GHSA-xx36-6rv4-gj8r"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Elixir ECDSA library","requires_auth":"none","summary":"Attackers can forge signatures on arbitrary messages due to missing non-zero checks in the Stark Bank Elixir ECDSA library.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"elixir_ecdsa","vendor":"starkbank"}],"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-347","name":"Improper Verification of Cryptographic Signature"}],"description":"The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.","ecosystems":["Hex"],"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-elixir fails to check signatures, vulnerable to message forging","id":"CVE-2021-43568","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"other","year":"2021"},"n_packages":2,"n_references":2,"next":{"headline":"Improper Verification of Cryptographic Signature in starkbank-ecdsa","id":"CVE-2021-43569"},"packages":[{"ecosystem":"Hex","fixed":["1.0.1"],"introduced":["1.0.0"],"last_affected":[],"package":"ecdsa-elixir","purl":null,"source":"GHSA-xx36-6rv4-gj8r"},{"ecosystem":"Hex","fixed":["1.0.1"],"introduced":["1.0.0"],"last_affected":[],"package":"ecdsa-elixir","purl":"pkg:hex/ecdsa-elixir","source":"GHSA-xx36-6rv4-gj8r"}],"prev":{"headline":"Race condition in n/a","id":"CVE-2021-43566"},"products":["n/a"],"published":"2021-11-09","related":[],"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 forge signatures on arbitrary messages due to missing non-zero checks in the Stark Bank Elixir ECDSA library.","url":"https://insights.sbomify.com/CVE-2021-43568/"}