{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-34740 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34740 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34740 is a high-severity vulnerability in Cisco Aironet Access Point Software, published on 23 Sep 2021."},"fix_prompt":"Check this codebase for CVE-2021-34740 and fix it if it is affected.\n\nWhat it is: CVE-2021-34740 is a high-severity vulnerability in Cisco Aironet Access Point Software, published on 23 Sep 2021. \nExploitation: There is no known exploitation of CVE-2021-34740 in the wild and no public exploit code.\n\nAffected product: Cisco Aironet Access Point Software. 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-2021-34740/ (Markdown: https://insights.sbomify.com/CVE-2021-34740/index.md)","id":"CVE-2021-34740","markdown":"https://insights.sbomify.com/CVE-2021-34740/index.md","name":"CVE-2021-34740","record":{"aliases":["GHSA-8j6f-39hh-f4v6"],"analysis":null,"analysis_generated_by":null,"assigner":"cisco","cpe":[{"product":"aironet_access_point_software","vendor":"cisco"}],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"A vulnerability in the WLAN Control Protocol (WCP) implementation for Cisco Aironet Access Point (AP) software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect error handling when an affected device receives an unexpected 802.11 frame. An attacker could exploit this vulnerability by sending certain 802.11 frames over the wireless network to an interface on an affected AP. A successful exploit could allow the attacker to cause a packet buffer leak. This could eventually result in buffer allocation failures, which would trigger a reload of 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 Aironet Access Points WLAN Control Protocol Packet Buffer Leak Denial of Service Vulnerability","id":"CVE-2021-34740","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Email Security Appliance Denial of Service Vulnerability","id":"CVE-2021-34741"},"packages":[],"prev":{"headline":"Cisco Small Business Series Switches Session Credentials Replay Vulnerability","id":"CVE-2021-34739"},"products":["Cisco Aironet Access Point Software"],"published":"2021-09-23","related":[{"cvss_score":9.8,"headline":"Auth bypass in Cisco Mobility Express 1800 Access Point Series","id":"CVE-2017-3831","kev_date_added":null,"published":"2017-03-15"},{"cvss_score":8.6,"headline":"Cisco Embedded Wireless Controller with Catalyst Access Points IP Flood Denial of Service Vulnerability","id":"CVE-2022-20622","kev_date_added":null,"published":"2022-04-15"},{"cvss_score":8.6,"headline":"Denial of service in Cisco Aironet 1810, 1830, and 1850 Series Access Points","id":"CVE-2018-0234","kev_date_added":null,"published":"2018-05-02"},{"cvss_score":8.1,"headline":"Denial of service in n/a","id":"CVE-2016-1419","kev_date_added":null,"published":"2016-06-10"},{"cvss_score":7.8,"headline":"Privilege escalation in n/a","id":"CVE-2016-6362","kev_date_added":null,"published":"2016-08-22"},{"cvss_score":7.8,"headline":"Denial of service in n/a","id":"CVE-2015-6367","kev_date_added":null,"published":"2015-11-14"},{"cvss_score":7.5,"headline":"Cisco Aironet Access Points FlexConnect Upgrade Information Disclosure Vulnerability","id":"CVE-2021-1437","kev_date_added":null,"published":"2021-03-24"}],"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":"2024-11-07","vendors":["Cisco"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2021-34740/"}