{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-1492 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-1492 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-1492 is a medium-severity path traversal vulnerability in Cisco Duo Authentication Proxy, published on 25 Mar 2021. 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-2021-1492 and fix it if it is affected.\n\nWhat it is: CVE-2021-1492 is a medium-severity path traversal vulnerability in Cisco Duo Authentication Proxy, published on 25 Mar 2021. 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-2021-1492 in the wild and no public exploit code.\n\nAffected product: Cisco Duo Authentication Proxy. 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-2021-1492/ (Markdown: https://insights.sbomify.com/CVE-2021-1492/index.md)","id":"CVE-2021-1492","markdown":"https://insights.sbomify.com/CVE-2021-1492/index.md","name":"CVE-2021-1492","record":{"aliases":["GHSA-5hf3-34gj-8w5g"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Duo Authentication Proxy","requires_auth":"low_privilege","summary":"Local attackers can exploit path validation flaws in the Duo Authentication Proxy installer to write to privileged directories, causing denial of service or privilege escalation.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"authentication_proxy","vendor":"duo"}],"cvss":{"score":6.6,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-64","name":"Windows Shortcut Following (.LNK)"}],"description":"The Duo Authentication Proxy installer prior to 5.2.1 did not properly validate file installation paths. This allows an attacker with local user privileges to coerce the installer to write to arbitrary privileged directories. If successful, an attacker can manipulate files used by Duo Authentication Proxy installer, cause Denial of Service (DoS) by deleting file(s), or replace system files to potentially achieve elevation of privileges. This is only exploitable during new installations, while the installer is running, and is not exploitable once installation has finished. Versions 5.2.1 of Duo Authentication Proxy installer addresses this issue.","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":"Duo Authentication Proxy Installer Denial of Service Vulnerability","id":"CVE-2021-1492","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-1493"},"packages":[],"prev":{"headline":"Cisco SD-WAN vManage Software Information Disclosure Vulnerability","id":"CVE-2021-1491"},"products":["Duo Authentication Proxy"],"published":"2021-03-25","related":[{"cvss_score":4.9,"headline":"Information disclosure in Cisco Duo Authentication Proxy","id":"CVE-2023-20207","kev_date_added":null,"published":"2023-07-12"}],"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":"partial"},"state":"PUBLISHED","updated":"2024-11-08","vendors":["Cisco"]},"summary":"Local attackers can exploit path validation flaws in the Duo Authentication Proxy installer to write to privileged directories, causing denial of service or privilege escalation.","url":"https://insights.sbomify.com/CVE-2021-1492/"}