{"answers":{"affected":"2 open source packages ship an affected version, including org.keycloak:keycloak-services. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-3424 in the wild and no public exploit code.","fix":"Upgrade org.keycloak:keycloak-services to 18.0.0 or later.","what":"CVE-2021-3424 is a medium-severity authentication bypass vulnerability in Redhat Single Sign-On, published on 1 Jun 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-2021-3424 and fix it if it is affected.\n\nWhat it is: CVE-2021-3424 is a medium-severity authentication bypass vulnerability in Redhat Single Sign-On, published on 1 Jun 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-2021-3424 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.keycloak:keycloak-services (Maven): affected all versions; fixed in 18.0.0\n- org.keycloak:keycloak-services (Maven): affected all versions; fixed in 18.0.0\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-2021-3424/ (Markdown: https://insights.sbomify.com/CVE-2021-3424/index.md)","id":"CVE-2021-3424","markdown":"https://insights.sbomify.com/CVE-2021-3424/index.md","name":"CVE-2021-3424","record":{"aliases":["GHSA-pf38-cw3p-22q9"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["privilege_escalation","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Keycloak SSO","requires_auth":"none","summary":"Attackers can use IDN homograph attacks to impersonate users and trick admins into granting extra privileges in Keycloak.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"single_sign-on","vendor":"redhat"}],"cvss":{"score":5.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"A flaw was found in keycloak as shipped in Red Hat Single Sign-On 7.4 where IDN homograph attacks are possible. A malicious user can register himself with a name already registered and trick admin to grant him extra privileges.","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":"Keycloak is vulnerable to IDN homograph attack","id":"CVE-2021-3424","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"redhat:single_sign-on","products":["redhat:single_sign-on"],"type":"auth_bypass","year":"2021"},"n_packages":2,"n_references":1,"next":{"headline":"Information disclosure in broker","id":"CVE-2021-3425"},"packages":[{"ecosystem":"Maven","fixed":["18.0.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-services","purl":null,"source":"GHSA-pf38-cw3p-22q9"},{"ecosystem":"Maven","fixed":["18.0.0"],"introduced":["0"],"last_affected":[],"package":"org.keycloak:keycloak-services","purl":"pkg:maven/org.keycloak/keycloak-services","source":"GHSA-pf38-cw3p-22q9"}],"prev":{"headline":"Privilege escalation in Bitdefender GravityZone Business Security","id":"CVE-2021-3423"},"products":["keycloak"],"published":"2021-06-01","related":[{"cvss_score":7.8,"headline":"Privilege escalation in containers/redhat-sso-7","id":"CVE-2020-10695","kev_date_added":null,"published":"2021-05-26"},{"cvss_score":3.8,"headline":"Keycloak vulnerable to Stored Cross site Scripting (XSS) when loading default roles","id":"CVE-2022-2256","kev_date_added":null,"published":"2022-09-01"},{"cvss_score":2.7,"headline":"Server-side request forgery in Red Hat Single Sign-On","id":"CVE-2020-14341","kev_date_added":null,"published":"2021-01-12"}],"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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Attackers can use IDN homograph attacks to impersonate users and trick admins into granting extra privileges in Keycloak.","url":"https://insights.sbomify.com/CVE-2021-3424/"}