{"answers":{"affected":"2 open source packages ship an affected version, including QuantConnect.Common. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-20136 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-20136 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-20136 is a critical unsafe deserialization vulnerability in n/a, published on 14 Dec 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-2020-20136 and fix it if it is affected.\n\nWhat it is: CVE-2020-20136 is a critical unsafe deserialization vulnerability in n/a, published on 14 Dec 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-2020-20136 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- QuantConnect.Common (NuGet): affected from 2.3.0.0 up to 2.4.0.1; no fix listed\n- QuantConnect.Common (NuGet): affected from 2.3.0.0 up to 2.4.0.1; no fix listed\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-2020-20136/ (Markdown: https://insights.sbomify.com/CVE-2020-20136/index.md)","id":"CVE-2020-20136","markdown":"https://insights.sbomify.com/CVE-2020-20136/index.md","name":"CVE-2020-20136","record":{"aliases":["GHSA-ww7r-278h-48mh"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"QuantConnect Lean","requires_auth":"none","summary":"Insecure deserialization in QuantConnect Lean allows remote code execution via malicious JSON payloads due to unsafe Json.NET configuration.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"lean","vendor":"quantconnect"}],"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":"QuantConnect Lean versions from 2.3.0.0 to 2.4.0.1 are affected by an insecure deserialization vulnerability due to insecure configuration of TypeNameHandling property in Json.NET library.","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":false,"headline":"QuantConnect Lean vulnerable to insecure deserialization","id":"CVE-2020-20136","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"deserialization","year":"2020"},"n_packages":2,"n_references":1,"next":{"headline":"Cross-site scripting in n/a","id":"CVE-2020-20138"},"packages":[{"ecosystem":"NuGet","fixed":[],"introduced":["2.3.0.0"],"last_affected":["2.4.0.1"],"package":"QuantConnect.Common","purl":null,"source":"GHSA-ww7r-278h-48mh"},{"ecosystem":"NuGet","fixed":[],"introduced":["2.3.0.0"],"last_affected":["2.4.0.1"],"package":"QuantConnect.Common","purl":"pkg:nuget/QuantConnect.Common","source":"GHSA-ww7r-278h-48mh"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2020-20131"},"products":["n/a"],"published":"2020-12-14","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":"Insecure deserialization in QuantConnect Lean allows remote code execution via malicious JSON payloads due to unsafe Json.NET configuration.","url":"https://insights.sbomify.com/CVE-2020-20136/"}