{"answers":{"affected":"4 open source packages ship an affected version, including activesupport. It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-8165 in the wild and no public exploit code.","fix":"Upgrade activesupport to a fixed version for your release line: 5.2.4.3 or 6.0.3.1.","what":"CVE-2020-8165 is a critical unsafe deserialization 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-2020-8165 and fix it if it is affected.\n\nWhat it is: CVE-2020-8165 is a critical unsafe deserialization 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-2020-8165 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- activesupport (RubyGems): affected from 5.0.0; fixed in 5.2.4.3\n- activesupport (RubyGems): affected from 5.0.0; fixed in 5.2.4.3\n- activesupport (RubyGems): affected from 6.0.0; fixed in 6.0.3.1\n- activesupport (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-2020-8165/ (Markdown: https://insights.sbomify.com/CVE-2020-8165/index.md)","id":"CVE-2020-8165","markdown":"https://insights.sbomify.com/CVE-2020-8165/index.md","name":"CVE-2020-8165","record":{"aliases":["DEBIAN-CVE-2020-8165","GHSA-2p68-f74v-9wc6","SUSE-SU-2020:2899-1","SUSE-SU-2020:2929-1","UBUNTU-CVE-2020-8165","openSUSE-SU-2020:1677-1","openSUSE-SU-2020:1679-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"Ruby on Rails","requires_auth":"none","summary":"Attackers can achieve remote code execution by exploiting unsafe deserialization in Rails cache stores when using MemCache or Redis.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"leap","vendor":"opensuse"},{"product":"rails","vendor":"rubyonrails"}],"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":"A deserialization of untrusted data vulnernerability exists in rails \u003c 5.2.4.3, rails \u003c 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.","ecosystems":["RubyGems","SUSE:Linux Enterprise High Availability Extension 15","SUSE:Linux Enterprise High Availability Extension 15 SP1","SUSE:Linux Enterprise High Availability Extension 15 SP2","SUSE:OpenStack Cloud 7","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","openSUSE:Leap 15.1","openSUSE:Leap 15.2"],"exploits":{"exploitdb":0,"first_seen":"2020-05-20","github_poc":7,"max_poc_stars":42,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-05-20T04:27:52Z","kind":"github_poc","ref":"https://github.com/masahiro331/CVE-2020-8165","stars":42,"title":null},{"date":"2021-01-03T21:59:09Z","kind":"github_poc","ref":"https://github.com/hybryx/CVE-2020-8165","stars":4,"title":null},{"date":"2020-11-13T09:01:12Z","kind":"github_poc","ref":"https://github.com/umiterkol/CVE-2020-8165--Auto-Shell","stars":1,"title":null},{"date":"2021-02-14T06:57:30Z","kind":"github_poc","ref":"https://github.com/danielklim/cve-2020-8165-demo","stars":1,"title":null},{"date":"2020-12-25T20:07:27Z","kind":"github_poc","ref":"https://github.com/taipansec/CVE-2020-8165","stars":0,"title":null},{"date":"2021-01-15T04:40:24Z","kind":"github_poc","ref":"https://github.com/AssassinUKG/CVE-2020-8165","stars":0,"title":null},{"date":"2021-01-15T07:31:21Z","kind":"github_poc","ref":"https://github.com/progfay/CVE-2020-8165","stars":0,"title":"PoC for CVE-2020-8165"}],"tier":"poc_unverified"},"has_fix":true,"headline":"ActiveSupport potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore","id":"CVE-2020-8165","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"debian:debian_linux","products":["debian:debian_linux","opensuse:leap","rubyonrails:rails"],"type":"deserialization","year":"2020"},"n_packages":12,"n_references":8,"next":{"headline":"Ability to forge per-form CSRF tokens in Rails","id":"CVE-2020-8166"},"packages":[{"ecosystem":"RubyGems","fixed":["5.2.4.3"],"introduced":["5.0.0"],"last_affected":[],"package":"activesupport","purl":null,"source":"GHSA-2p68-f74v-9wc6"},{"ecosystem":"RubyGems","fixed":["5.2.4.3"],"introduced":["5.0.0"],"last_affected":[],"package":"activesupport","purl":"pkg:gem/activesupport","source":"GHSA-2p68-f74v-9wc6"},{"ecosystem":"RubyGems","fixed":["6.0.3.1"],"introduced":["6.0.0"],"last_affected":[],"package":"activesupport","purl":null,"source":"GHSA-2p68-f74v-9wc6"},{"ecosystem":"RubyGems","fixed":["6.0.3.1"],"introduced":["6.0.0"],"last_affected":[],"package":"activesupport","purl":"pkg:gem/activesupport","source":"GHSA-2p68-f74v-9wc6"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15","fixed":["5.1.4-3.3.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-5_1","purl":"pkg:rpm/suse/rubygem-activesupport-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015","source":"SUSE-SU-2020:2899-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP1","fixed":["5.1.4-3.3.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-5_1","purl":"pkg:rpm/suse/rubygem-activesupport-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1","source":"SUSE-SU-2020:2899-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP2","fixed":["5.1.4-3.3.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-5_1","purl":"pkg:rpm/suse/rubygem-activesupport-5_1\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2","source":"SUSE-SU-2020:2899-1"},{"ecosystem":"SUSE:OpenStack Cloud 7","fixed":["4.2.9-7.9.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-4_2","purl":"pkg:rpm/suse/rubygem-activesupport-4_2\u0026distro=SUSE%20OpenStack%20Cloud%207","source":"SUSE-SU-2020:2929-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 8","fixed":["4.2.9-7.9.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-4_2","purl":"pkg:rpm/suse/rubygem-activesupport-4_2\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%208","source":"SUSE-SU-2020:2929-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["4.2.9-7.9.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-4_2","purl":"pkg:rpm/suse/rubygem-activesupport-4_2\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2020:2929-1"},{"ecosystem":"openSUSE:Leap 15.1","fixed":["5.1.4-lp151.3.3.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-5_1","purl":"pkg:rpm/opensuse/rubygem-activesupport-5_1\u0026distro=openSUSE%20Leap%2015.1","source":"openSUSE-SU-2020:1677-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["5.1.4-lp152.4.3.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-activesupport-5_1","purl":"pkg:rpm/opensuse/rubygem-activesupport-5_1\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2020:1679-1"}],"prev":{"headline":"Possible Strong Parameters Bypass in ActionPack","id":"CVE-2020-8164"},"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":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"2025-05-09","vendors":["n/a"]},"summary":"Attackers can achieve remote code execution by exploiting unsafe deserialization in Rails cache stores when using MemCache or Redis.","url":"https://insights.sbomify.com/CVE-2020-8165/"}