{"answers":{"affected":"2 open source packages ship an affected version, including Halibut. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-31819 in the wild and no public exploit code.","fix":"Upgrade Halibut to 4.4.7 or later.","what":"CVE-2021-31819 is a critical unsafe deserialization vulnerability in Octopus Deploy Halibut, published on 22 Sep 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-2021-31819 and fix it if it is affected.\n\nWhat it is: CVE-2021-31819 is a critical unsafe deserialization vulnerability in Octopus Deploy Halibut, published on 22 Sep 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-2021-31819 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Halibut (NuGet): affected all versions; fixed in 4.4.7\n- Halibut (NuGet): affected all versions; fixed in 4.4.7\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-2021-31819/ (Markdown: https://insights.sbomify.com/CVE-2021-31819/index.md)","id":"CVE-2021-31819","markdown":"https://insights.sbomify.com/CVE-2021-31819/index.md","name":"CVE-2021-31819","record":{"aliases":["GHSA-hpf7-4c2g-9chf"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Halibut library","requires_auth":"none","summary":"A deserialization vulnerability in the Halibut library allows remote code execution on systems that trust each other via certificate verification.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Octopus","cpe":[{"product":"halibut","vendor":"octopus"}],"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-502","name":"Deserialization of Untrusted Data"}],"description":"In Halibut versions prior to 4.4.7 there is a deserialisation vulnerability that could allow remote code execution on systems that already trust each other based on certificate verification.","ecosystems":["NuGet"],"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":"Remote Code Execution in Halibut","id":"CVE-2021-31819","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"deserialization","year":"2021"},"n_packages":2,"n_references":1,"next":{"headline":"Information disclosure in Octopus Server","id":"CVE-2021-31820"},"packages":[{"ecosystem":"NuGet","fixed":["4.4.7"],"introduced":["0"],"last_affected":[],"package":"Halibut","purl":null,"source":"GHSA-hpf7-4c2g-9chf"},{"ecosystem":"NuGet","fixed":["4.4.7"],"introduced":["0"],"last_affected":[],"package":"Halibut","purl":"pkg:nuget/Halibut","source":"GHSA-hpf7-4c2g-9chf"}],"prev":{"headline":"SQL injection in Octopus Server","id":"CVE-2021-31818"},"products":["Halibut"],"published":"2021-09-22","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":"2024-08-03","vendors":["Octopus Deploy"]},"summary":"A deserialization vulnerability in the Halibut library allows remote code execution on systems that trust each other via certificate verification.","url":"https://insights.sbomify.com/CVE-2021-31819/"}