{"answers":{"affected":"12 open source packages ship an affected version, including org.apereo.cas:cas-server-support-otp-mfa-core and org.apereo.cas:cas-server-webapp. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-27178 in the wild and no public exploit code.","fix":"Upgrade org.apereo.cas:cas-server-support-otp-mfa-core to a fixed version for your release line: 5.3.16, 6.1.7.2 or 6.2.4.","what":"CVE-2020-27178 is a high-severity authentication bypass vulnerability in n/a, published on 16 Oct 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-2020-27178 and fix it if it is affected.\n\nWhat it is: CVE-2020-27178 is a high-severity authentication bypass vulnerability in n/a, published on 16 Oct 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-2020-27178 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apereo.cas:cas-server-support-otp-mfa-core (Maven): affected from 5.3.0; fixed in 5.3.16\n- org.apereo.cas:cas-server-support-otp-mfa-core (Maven): affected from 5.3.0; fixed in 5.3.16\n- org.apereo.cas:cas-server-support-otp-mfa-core (Maven): affected from 6.0.0; fixed in 6.1.7.2\n- org.apereo.cas:cas-server-support-otp-mfa-core (Maven): affected from 6.0.0; fixed in 6.1.7.2\n- org.apereo.cas:cas-server-support-otp-mfa-core (Maven): affected from 6.2.0; fixed in 6.2.4\n- org.apereo.cas:cas-server-support-otp-mfa-core (Maven): affected from 6.2.0; fixed in 6.2.4\n- org.apereo.cas:cas-server-webapp (Maven): affected from 5.3.0; fixed in 5.3.16\n- org.apereo.cas:cas-server-webapp (Maven): affected from 5.3.0; fixed in 5.3.16\n- org.apereo.cas:cas-server-webapp (Maven): affected from 6.0.0; fixed in 6.1.7.2\n- org.apereo.cas:cas-server-webapp (Maven): affected from 6.0.0; fixed in 6.1.7.2\n- org.apereo.cas:cas-server-webapp (Maven): affected from 6.2.0; fixed in 6.2.4\n- org.apereo.cas:cas-server-webapp (Maven): affected from 6.2.0; fixed in 6.2.4\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-2020-27178/ (Markdown: https://insights.sbomify.com/CVE-2020-27178/index.md)","id":"CVE-2020-27178","markdown":"https://insights.sbomify.com/CVE-2020-27178/index.md","name":"CVE-2020-27178","record":{"aliases":["GHSA-q39c-5vh5-vw2p"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Apereo CAS","requires_auth":"none","summary":"Attackers can bypass multifactor authentication in Apereo CAS due to mishandled secret keys with Google Authenticator.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"central_authentication_service","vendor":"apereo"}],"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":[],"description":"Apereo CAS 5.3.x before 5.3.16, 6.x before 6.1.7.2, 6.2.x before 6.2.4, and 6.3.x before 6.3.0-RC4 mishandles secret keys with Google Authenticator for multifactor authentication.","ecosystems":["Maven"],"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":"Improper Authentication in Apereo CAS","id":"CVE-2020-27178","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"auth_bypass","year":"2020"},"n_packages":12,"n_references":1,"next":{"headline":"Business logic in n/a","id":"CVE-2020-27179"},"packages":[{"ecosystem":"Maven","fixed":["5.3.16"],"introduced":["5.3.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-support-otp-mfa-core","purl":null,"source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["5.3.16"],"introduced":["5.3.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-support-otp-mfa-core","purl":"pkg:maven/org.apereo.cas/cas-server-support-otp-mfa-core","source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.1.7.2"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-support-otp-mfa-core","purl":null,"source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.1.7.2"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-support-otp-mfa-core","purl":"pkg:maven/org.apereo.cas/cas-server-support-otp-mfa-core","source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.2.4"],"introduced":["6.2.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-support-otp-mfa-core","purl":null,"source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.2.4"],"introduced":["6.2.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-support-otp-mfa-core","purl":"pkg:maven/org.apereo.cas/cas-server-support-otp-mfa-core","source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["5.3.16"],"introduced":["5.3.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-webapp","purl":null,"source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["5.3.16"],"introduced":["5.3.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-webapp","purl":"pkg:maven/org.apereo.cas/cas-server-webapp","source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.1.7.2"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-webapp","purl":null,"source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.1.7.2"],"introduced":["6.0.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-webapp","purl":"pkg:maven/org.apereo.cas/cas-server-webapp","source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.2.4"],"introduced":["6.2.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-webapp","purl":null,"source":"GHSA-q39c-5vh5-vw2p"},{"ecosystem":"Maven","fixed":["6.2.4"],"introduced":["6.2.0"],"last_affected":[],"package":"org.apereo.cas:cas-server-webapp","purl":"pkg:maven/org.apereo.cas/cas-server-webapp","source":"GHSA-q39c-5vh5-vw2p"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2020-27176"},"products":["n/a"],"published":"2020-10-16","related":[{"cvss_score":9.8,"headline":"MFA bypass in Apereo CAS","id":"CVE-2023-4612","kev_date_added":null,"published":"2023-11-09"},{"cvss_score":9.1,"headline":"CAS \u003c= 1.0.0 - Unauthenticated SSRF","id":"CVE-2024-4399","kev_date_added":null,"published":"2024-05-23"},{"cvss_score":8.1,"headline":"Use of Insufficiently Random Values in Apereo CAS","id":"CVE-2019-10754","kev_date_added":null,"published":"2019-09-23"},{"cvss_score":7.5,"headline":"Auth bypass in n/a","id":"CVE-2015-1169","kev_date_added":null,"published":"2015-02-10"},{"cvss_score":6.3,"headline":"Apereo CAS login session expiration","id":"CVE-2024-11208","kev_date_added":null,"published":"2024-11-14"},{"cvss_score":6.1,"headline":"Cross-site Scripting in Apereo CAS","id":"CVE-2021-42567","kev_date_added":null,"published":"2021-12-07"}],"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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can bypass multifactor authentication in Apereo CAS due to mishandled secret keys with Google Authenticator.","url":"https://insights.sbomify.com/CVE-2020-27178/"}