{"answers":{"affected":"4 open source packages ship an affected version, including activestorage. It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-8162 in the wild and no public exploit code.","fix":"Upgrade activestorage to a fixed version for your release line: 5.2.4.3 or 6.0.3.1.","what":"CVE-2020-8162 is a high-severity vulnerability in Debian Debian Linux, published on 19 Jun 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-2020-8162 and fix it if it is affected.\n\nWhat it is: CVE-2020-8162 is a high-severity vulnerability in Debian Debian Linux, published on 19 Jun 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-2020-8162 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- activestorage (RubyGems): affected from 5.0.0; fixed in 5.2.4.3\n- activestorage (RubyGems): affected from 5.0.0; fixed in 5.2.4.3\n- activestorage (RubyGems): affected from 6.0.0; fixed in 6.0.3.1\n- activestorage (RubyGems): affected from 6.0.0; fixed in 6.0.3.1\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-2020-8162/ (Markdown: https://insights.sbomify.com/CVE-2020-8162/index.md)","id":"CVE-2020-8162","markdown":"https://insights.sbomify.com/CVE-2020-8162/index.md","name":"CVE-2020-8162","record":{"aliases":["DEBIAN-CVE-2020-8162","GHSA-m42x-37p3-fv5w","UBUNTU-CVE-2020-8162"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby on Rails","requires_auth":"none","summary":"Attackers can bypass upload limits in ActiveStorage S3 adapter by modifying Content-Length, requiring an upgrade to Rails.","user_interaction":"not_required","vuln_class":"file_upload"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"rails","vendor":"rubyonrails"}],"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-434","name":"Unrestricted Upload of File with Dangerous Type"},{"id":"CWE-602","name":"Client-Side Enforcement of Server-Side Security"}],"description":"A client side enforcement of server side security vulnerability exists in rails \u003c 5.2.4.2 and rails \u003c 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.","ecosystems":["RubyGems"],"exploits":{"exploitdb":0,"first_seen":"2020-04-05","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-04-05T08:17:56Z","kind":"github_poc","ref":"https://github.com/usutani/study-turbolinks-link","stars":0,"title":"Known security vulnerabilities detected. CVE-2022-21831 Critical severity CVE-2025-24293 Critical severity CVE-2020-8162 High severity CVE-2024-26144 Moderate severity"}],"tier":"poc_unverified"},"has_fix":true,"headline":"Circumvention of file size limits in ActiveStorage","id":"CVE-2020-8162","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"debian:debian_linux","products":["debian:debian_linux","rubyonrails:rails"],"type":"file_upload","year":"2020"},"n_packages":4,"n_references":3,"next":{"headline":"Remote code execution via user-provided local names in ActionView","id":"CVE-2020-8163"},"packages":[{"ecosystem":"RubyGems","fixed":["5.2.4.3"],"introduced":["5.0.0"],"last_affected":[],"package":"activestorage","purl":null,"source":"GHSA-m42x-37p3-fv5w"},{"ecosystem":"RubyGems","fixed":["5.2.4.3"],"introduced":["5.0.0"],"last_affected":[],"package":"activestorage","purl":"pkg:gem/activestorage","source":"GHSA-m42x-37p3-fv5w"},{"ecosystem":"RubyGems","fixed":["6.0.3.1"],"introduced":["6.0.0"],"last_affected":[],"package":"activestorage","purl":null,"source":"GHSA-m42x-37p3-fv5w"},{"ecosystem":"RubyGems","fixed":["6.0.3.1"],"introduced":["6.0.0"],"last_affected":[],"package":"activestorage","purl":"pkg:gem/activestorage","source":"GHSA-m42x-37p3-fv5w"}],"prev":{"headline":"Directory traversal in Rack::Directory app bundled with Rack","id":"CVE-2020-8161"},"products":["https://github.com/rails/rails"],"published":"2020-06-19","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can bypass upload limits in ActiveStorage S3 adapter by modifying Content-Length, requiring an upgrade to Rails.","url":"https://insights.sbomify.com/CVE-2020-8162/"}