{"answers":{"affected":"5 open source packages ship an affected version, including ckb. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-45699 in the wild and no public exploit code.","fix":"Upgrade ckb to 0.40.0 or later.","what":"CVE-2021-45699 is a high-severity denial of service vulnerability in n/a, published on 26 Dec 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-2021-45699 and fix it if it is affected.\n\nWhat it is: CVE-2021-45699 is a high-severity denial of service vulnerability in n/a, published on 26 Dec 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-2021-45699 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ckb (crates.io): affected all versions; fixed in 0.40.0\n- ckb (crates.io): affected all versions; fixed in 0.40.0\n- ckb (crates.io): affected all versions; fixed in 0.40.0\n- ckb (crates.io): affected all versions; fixed in 0.40.0\n- ckb (crates.io): affected from 0.0.0-0; fixed in 0.40.0\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-2021-45699/ (Markdown: https://insights.sbomify.com/CVE-2021-45699/index.md)","id":"CVE-2021-45699","markdown":"https://insights.sbomify.com/CVE-2021-45699/index.md","name":"CVE-2021-45699","record":{"aliases":["GHSA-2969-8hh9-57jc","GHSA-48vq-8jqv-gm6f","RUSTSEC-2021-0108"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Rust blockchain library","requires_auth":"none","summary":"Remote attackers can cause a denial of service in the Nervos CKB blockchain by triggering memory allocation failures in the ckb crate.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ckb","vendor":"nervos"}],"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:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"An issue was discovered in the ckb crate before 0.40.0 for Rust. Remote attackers may be able to conduct a 51% attack against the Nervos CKB blockchain by triggering an inability to allocate memory for the misbehavior HashMap.","ecosystems":["crates.io"],"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":"Allocation of Resources Without Limits or Throttling in ckb","id":"CVE-2021-45699","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":5,"n_references":2,"next":{"headline":"Process crashes when the cell used as DepGroup is not alive","id":"CVE-2021-45700"},"packages":[{"ecosystem":"crates.io","fixed":["0.40.0"],"introduced":["0"],"last_affected":[],"package":"ckb","purl":null,"source":"GHSA-2969-8hh9-57jc"},{"ecosystem":"crates.io","fixed":["0.40.0"],"introduced":["0"],"last_affected":[],"package":"ckb","purl":"pkg:cargo/ckb","source":"GHSA-2969-8hh9-57jc"},{"ecosystem":"crates.io","fixed":["0.40.0"],"introduced":["0"],"last_affected":[],"package":"ckb","purl":null,"source":"GHSA-48vq-8jqv-gm6f"},{"ecosystem":"crates.io","fixed":["0.40.0"],"introduced":["0"],"last_affected":[],"package":"ckb","purl":"pkg:cargo/ckb","source":"GHSA-48vq-8jqv-gm6f"},{"ecosystem":"crates.io","fixed":["0.40.0"],"introduced":["0.0.0-0"],"last_affected":[],"package":"ckb","purl":"pkg:cargo/ckb","source":"RUSTSEC-2021-0108"}],"prev":{"headline":"RPC call failure in ckb","id":"CVE-2021-45698"},"products":["n/a"],"published":"2021-12-26","related":[{"cvss_score":9.8,"headline":"RPC call failure in ckb","id":"CVE-2021-45698","kev_date_added":null,"published":"2021-12-26"},{"cvss_score":7.5,"headline":"Process crashes when the cell used as DepGroup is not alive","id":"CVE-2021-45700","kev_date_added":null,"published":"2021-12-26"}],"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":"open","licence":"CC0 1.0","name":"RustSec","prefix":"RUSTSEC"},{"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":"Remote attackers can cause a denial of service in the Nervos CKB blockchain by triggering memory allocation failures in the ckb crate.","url":"https://insights.sbomify.com/CVE-2021-45699/"}