{"answers":{"affected":"4 open source packages ship an affected version, including ruby, ruby-min and tmpdir. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-28966 in the wild and no public exploit code.","fix":"Upgrade ruby to a fixed version for your release line: 2.7.3 or 3.0.1.","what":"CVE-2021-28966 is a high-severity path traversal vulnerability in Ruby-Lang Ruby, published on 27 Jul 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-2021-28966 and fix it if it is affected.\n\nWhat it is: CVE-2021-28966 is a high-severity path traversal vulnerability in Ruby-Lang Ruby, published on 27 Jul 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-2021-28966 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ruby (Bitnami): affected all versions; fixed in 2.7.3, 3.0.1\n- ruby-min (Bitnami): affected all versions; fixed in 2.7.3, 3.0.1\n- tmpdir (RubyGems): affected all versions; fixed in 0.1.2\n- tmpdir (RubyGems): affected all versions; fixed in 0.1.2\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-2021-28966/ (Markdown: https://insights.sbomify.com/CVE-2021-28966/index.md)","id":"CVE-2021-28966","markdown":"https://insights.sbomify.com/CVE-2021-28966/index.md","name":"CVE-2021-28966","record":{"aliases":["ALPINE-CVE-2021-28966","BIT-ruby-2021-28966","BIT-ruby-min-2021-28966","CLEANSTART-2026-YW10276","GHSA-46f2-3v63-3xrp","JLSEC-2026-1283"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby standard library","requires_auth":"none","summary":"A remote attacker can exploit a path traversal vulnerability in Ruby's TmpDir handling on Windows to read or modify arbitrary files.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ruby","vendor":"ruby-lang"}],"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:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"In Ruby through 3.0 on Windows, a remote attacker can submit a crafted path when a Web application handles a parameter with TmpDir.","ecosystems":["Bitnami","RubyGems"],"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":"Tempfile on Windows path traversal vulnerability","id":"CVE-2021-28966","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"ruby-lang:ruby","products":["ruby-lang:ruby"],"type":"path_traversal","year":"2021"},"n_packages":4,"n_references":2,"next":{"headline":"Code injection in n/a","id":"CVE-2021-28967"},"packages":[{"ecosystem":"Bitnami","fixed":["2.7.3","3.0.1"],"introduced":["0","3.0.0"],"last_affected":[],"package":"ruby","purl":"pkg:bitnami/ruby","source":"BIT-ruby-2021-28966"},{"ecosystem":"Bitnami","fixed":["2.7.3","3.0.1"],"introduced":["0","3.0.0"],"last_affected":[],"package":"ruby-min","purl":"pkg:bitnami/ruby-min","source":"BIT-ruby-min-2021-28966"},{"ecosystem":"RubyGems","fixed":["0.1.2"],"introduced":["0"],"last_affected":[],"package":"tmpdir","purl":null,"source":"GHSA-46f2-3v63-3xrp"},{"ecosystem":"RubyGems","fixed":["0.1.2"],"introduced":["0"],"last_affected":[],"package":"tmpdir","purl":"pkg:gem/tmpdir","source":"GHSA-46f2-3v63-3xrp"}],"prev":{"headline":"REXML round-trip instability","id":"CVE-2021-28965"},"products":["n/a"],"published":"2021-07-27","related":[{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-4124","kev_date_added":null,"published":"2009-12-11"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2022-28738","kev_date_added":null,"published":"2022-05-09"},{"cvss_score":9.8,"headline":"Weak cryptography in OpenSSL extension of Ruby (Git trunk)","id":"CVE-2011-4121","kev_date_added":null,"published":"2019-11-26"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2017-17790","kev_date_added":null,"published":"2017-12-20"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2017-11465","kev_date_added":null,"published":"2017-07-19"},{"cvss_score":9.8,"headline":"Memory corruption in Ruby","id":"CVE-2016-2336","kev_date_added":null,"published":"2017-01-06"},{"cvss_score":9.8,"headline":"Code injection in Ruby","id":"CVE-2016-2337","kev_date_added":null,"published":"2017-01-06"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":["n/a"]},"summary":"A remote attacker can exploit a path traversal vulnerability in Ruby's TmpDir handling on Windows to read or modify arbitrary files.","url":"https://insights.sbomify.com/CVE-2021-28966/"}