{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-4300 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-4300 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-4300 is a medium-severity missing authorization vulnerability in ghostlander Halcyon, published on 4 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-4300 and fix it if it is affected.\n\nWhat it is: CVE-2021-4300 is a medium-severity missing authorization vulnerability in ghostlander Halcyon, published on 4 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-4300 in the wild and no public exploit code.\n\nAffected product: ghostlander Halcyon. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2021-4300/ (Markdown: https://insights.sbomify.com/CVE-2021-4300/index.md)","id":"CVE-2021-4300","markdown":"https://insights.sbomify.com/CVE-2021-4300/index.md","name":"CVE-2021-4300","record":{"aliases":["GHSA-hxx9-636q-j4p5"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Halcyon cryptocurrency client","requires_auth":"low_privilege","summary":"Remote attackers can bypass access controls in block verification, potentially modifying blockchain data in Halcyon cryptocurrency clients.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"halcyon","vendor":"halcyon_project"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"A vulnerability has been found in ghostlander Halcyon and classified as critical. Affected by this vulnerability is the function CBlock::AddToBlockIndex of the file src/main.cpp of the component Block Verification. The manipulation leads to improper access controls. The attack can be launched remotely. Upgrading to version 1.1.1.0-hal is able to address this issue. The identifier of the patch is 0675b25ae9cc10b5fdc8ea3a32c642979762d45e. It is recommended to upgrade the affected component. The identifier VDB-217417 was assigned to this vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"ghostlander Halcyon Block Verification main.cpp AddToBlockIndex access control","id":"CVE-2021-4300","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"slackero phpwcms sql injection","id":"CVE-2021-4301"},"packages":[],"prev":{"headline":"cronvel string-kit naturalSort.js naturalSort redos","id":"CVE-2021-4299"},"products":["Halcyon"],"published":"2023-01-04","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2024-08-03","vendors":["ghostlander"]},"summary":"Remote attackers can bypass access controls in block verification, potentially modifying blockchain data in Halcyon cryptocurrency clients.","url":"https://insights.sbomify.com/CVE-2021-4300/"}