{"answers":{"affected":"3 open source packages ship an affected version, including remarshal. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-47163 exists.","fix":"Upgrade remarshal to 0.17.1 or later.","what":"CVE-2023-47163 is a high-severity denial of service vulnerability in Remarshal-project Remarshal, published on 13 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-47163 and fix it if it is affected.\n\nWhat it is: CVE-2023-47163 is a high-severity denial of service vulnerability in Remarshal-project Remarshal, published on 13 Nov 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-47163 exists.\n\nAffected packages and fixed versions:\n- remarshal (PyPI): affected all versions; fixed in 0.17.1\n- remarshal (PyPI): affected all versions; fixed in 0.17.1\n- remarshal (PyPI): affected all versions; fixed in 0.17.1\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-2023-47163/ (Markdown: https://insights.sbomify.com/CVE-2023-47163/index.md)","id":"CVE-2023-47163","markdown":"https://insights.sbomify.com/CVE-2023-47163/index.md","name":"CVE-2023-47163","record":{"aliases":["GHSA-gw7g-qr8w-3448","PYSEC-2023-236"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"YAML processing library","requires_auth":"none","summary":"Attackers can cause denial of service by providing malicious YAML files with unlimited alias expansion to applications using Remarshal.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"remarshal","vendor":"remarshal_project"}],"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-674","name":"Uncontrolled Recursion"}],"description":"Remarshal prior to v0.17.1 expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack. Processing untrusted YAML files may cause a denial-of-service (DoS) condition.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Remarshal expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack","id":"CVE-2023-47163","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2023"},"n_packages":3,"n_references":3,"next":{"headline":"Cross-site scripting in HOTELDRUID","id":"CVE-2023-47164"},"packages":[{"ecosystem":"PyPI","fixed":["0.17.1"],"introduced":["0"],"last_affected":[],"package":"remarshal","purl":null,"source":"GHSA-gw7g-qr8w-3448"},{"ecosystem":"PyPI","fixed":["0.17.1"],"introduced":["0"],"last_affected":[],"package":"remarshal","purl":"pkg:pypi/remarshal","source":"GHSA-gw7g-qr8w-3448"},{"ecosystem":"PyPI","fixed":["0.17.1"],"introduced":["0"],"last_affected":[],"package":"remarshal","purl":"pkg:pypi/remarshal","source":"PYSEC-2023-236"}],"prev":{"headline":"IBM Secure Proxy cross-site scripting","id":"CVE-2023-47162"},"products":["Remarshal"],"published":"2023-11-13","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":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-01-08","vendors":["Remarshal-project"]},"summary":"Attackers can cause denial of service by providing malicious YAML files with unlimited alias expansion to applications using Remarshal.","url":"https://insights.sbomify.com/CVE-2023-47163/"}