{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-27847 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2020-27847 is a critical authentication bypass vulnerability in dexidp/dex, published on 28 May 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-2020-27847 and fix it if it is affected.\n\nWhat it is: CVE-2020-27847 is a critical authentication bypass vulnerability in dexidp/dex, published on 28 May 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-2020-27847 in the wild and no public exploit code.\n\nAffected product: dexidp/dex. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2020-27847/ (Markdown: https://insights.sbomify.com/CVE-2020-27847/index.md)","id":"CVE-2020-27847","markdown":"https://insights.sbomify.com/CVE-2020-27847/index.md","name":"CVE-2020-27847","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass","data_read","data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go SAML library","requires_auth":"none","summary":"Attackers can bypass SAML authentication in the Dex library, compromising confidentiality, integrity, and availability.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"dex","vendor":"linuxfoundation"}],"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-228","name":"Improper Handling of Syntactically Invalid Structure"}],"description":"A vulnerability exists in the SAML connector of the github.com/dexidp/dex library used to process SAML Signature Validation. This flaw allows an attacker to bypass SAML authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects dex versions before 2.27.0.","ecosystems":[],"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":"Auth bypass in dexidp/dex","id":"CVE-2020-27847","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2020"},"n_packages":0,"n_references":3,"next":{"headline":"SQL injection in n/a","id":"CVE-2020-27848"},"packages":[],"prev":{"headline":"XML Processing error in github.com/crewjam/saml","id":"CVE-2020-27846"},"products":["dexidp/dex"],"published":"2021-05-28","related":[{"cvss_score":9.3,"headline":"OAuth authorization code exposure in Dex","id":"CVE-2022-39222","kev_date_added":null,"published":"2022-10-06"},{"cvss_score":9.3,"headline":"Critical security issues in XML encoding in Dex","id":"CVE-2020-26290","kev_date_added":null,"published":"2020-12-28"},{"cvss_score":7.5,"headline":"Dex 2.37.0 is discarding TLSconfig and always serves deprecated TLS 1.0/1.1 and insecure ciphers","id":"CVE-2024-23656","kev_date_added":null,"published":"2024-01-25"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can bypass SAML authentication in the Dex library, compromising confidentiality, integrity, and availability.","url":"https://insights.sbomify.com/CVE-2020-27847/"}