{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-20123 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-20123 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-20123 is a medium-severity authentication bypass vulnerability in Cisco Duo, published on 5 Apr 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2023-20123 and fix it if it is affected.\n\nWhat it is: CVE-2023-20123 is a medium-severity authentication bypass vulnerability in Cisco Duo, published on 5 Apr 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2023-20123 in the wild and no public exploit code.\n\nAffected product: Cisco Duo. 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-2023-20123/ (Markdown: https://insights.sbomify.com/CVE-2023-20123/index.md)","id":"CVE-2023-20123","markdown":"https://insights.sbomify.com/CVE-2023-20123/index.md","name":"CVE-2023-20123","record":{"aliases":["GHSA-gp8j-qw75-8q9q"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["privilege_escalation","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Duo Authentication","requires_auth":"none","summary":"Physical attackers can replay expired MFA codes in offline mode to bypass authentication and gain unauthorized access to macOS or Windows devices.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"duo","vendor":"cisco"},{"product":"duo_authentication_for_windows_logon_and_rdp","vendor":"cisco"}],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-294","name":"Authentication Bypass by Capture-replay"}],"description":"A vulnerability in the offline access mode of Cisco Duo Two-Factor Authentication for macOS and Duo Authentication for Windows Logon and RDP could allow an unauthenticated, physical attacker to replay valid user session credentials and gain unauthorized access to an affected macOS or Windows device. This vulnerability exists because session credentials do not properly expire. An attacker could exploit this vulnerability by replaying previously used multifactor authentication (MFA) codes to bypass MFA protection. A successful exploit could allow the attacker to gain unauthorized access to the affected device.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cisco Duo Authentication for macOS and Duo Authentication for Windows Logon Offline Credentials Replay Vulnerability","id":"CVE-2023-20123","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers Remote Command Execution Vulnerability","id":"CVE-2023-20124"},"packages":[],"prev":{"headline":"Command injection in Cisco Identity Services Engine Software","id":"CVE-2023-20122"},"products":["Cisco Duo"],"published":"2023-04-05","related":[{"cvss_score":6.2,"headline":"Cisco Duo Two-Factor Authentication for macOS Authentication Bypass Vulnerability","id":"CVE-2023-20199","kev_date_added":null,"published":"2023-06-28"},{"cvss_score":6.1,"headline":"Cisco Duo for macOS Authentication Bypass Vulnerability","id":"CVE-2022-20662","kev_date_added":null,"published":"2022-09-30"},{"cvss_score":5.4,"headline":"Command injection in Cisco Duo","id":"CVE-2025-20258","kev_date_added":null,"published":"2025-05-21"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-10-28","vendors":["Cisco"]},"summary":"Physical attackers can replay expired MFA codes in offline mode to bypass authentication and gain unauthorized access to macOS or Windows devices.","url":"https://insights.sbomify.com/CVE-2023-20123/"}