{"answers":{"affected":"It affects 11 products.","exploited":"There is no known exploitation of CVE-2021-34793 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34793 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34793 is a high-severity denial of service vulnerability in Cisco Adaptive Security Appliance, published on 27 Oct 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-2021-34793 and fix it if it is affected.\n\nWhat it is: CVE-2021-34793 is a high-severity denial of service vulnerability in Cisco Adaptive Security Appliance, published on 27 Oct 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-2021-34793 in the wild and no public exploit code.\n\nAffected product: Cisco Adaptive Security Appliance. 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-2021-34793/ (Markdown: https://insights.sbomify.com/CVE-2021-34793/index.md)","id":"CVE-2021-34793","markdown":"https://insights.sbomify.com/CVE-2021-34793/index.md","name":"CVE-2021-34793","record":{"aliases":["GHSA-jjpm-mxjp-g6mw"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Cisco ASA/FTD firewall","requires_auth":"none","summary":"Remote attackers can cause network disruption by poisoning MAC address tables on Cisco ASA or FTD devices operating in transparent mode.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"adaptive_security_appliance","vendor":"cisco"},{"product":"adaptive_security_appliance_software","vendor":"cisco"},{"product":"asa_5505_firmware","vendor":"cisco"},{"product":"asa_5512-x_firmware","vendor":"cisco"},{"product":"asa_5515-x_firmware","vendor":"cisco"},{"product":"asa_5525-x_firmware","vendor":"cisco"},{"product":"asa_5545-x_firmware","vendor":"cisco"},{"product":"asa_5555-x_firmware","vendor":"cisco"},{"product":"asa_5580_firmware","vendor":"cisco"},{"product":"asa_5585-x_firmware","vendor":"cisco"},{"product":"secure_firewall_threat_defense","vendor":"cisco"}],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-924","name":"Improper Enforcement of Message Integrity During Transmission in a Communication Channel"}],"description":"A vulnerability in the TCP Normalizer of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software operating in transparent mode could allow an unauthenticated, remote attacker to poison MAC address tables, resulting in a denial of service (DoS) vulnerability. This vulnerability is due to incorrect handling of certain TCP segments when the affected device is operating in transparent mode. An attacker could exploit this vulnerability by sending a crafted TCP segment through an affected device. A successful exploit could allow the attacker to poison the MAC address tables in adjacent devices, resulting in network disruption.","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":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-34793","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"cisco:adaptive_security_appliance","products":["cisco:adaptive_security_appliance","cisco:adaptive_security_appliance_software","cisco:secure_firewall_threat_defense"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SNMP Access Control Vulnerability","id":"CVE-2021-34794"},"packages":[],"prev":{"headline":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-34792"},"products":["Cisco Adaptive Security Appliance (ASA) Software"],"published":"2021-10-27","related":[{"cvss_score":8.6,"headline":"Denial of service in Cisco Adaptive Security Appliance Software","id":"CVE-2021-1573","kev_date_added":null,"published":"2022-01-11"},{"cvss_score":8.6,"headline":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-40117","kev_date_added":null,"published":"2021-10-27"},{"cvss_score":8.6,"headline":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-40118","kev_date_added":null,"published":"2021-10-27"},{"cvss_score":8.6,"headline":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2020-3304","kev_date_added":null,"published":"2020-10-21"},{"cvss_score":8.6,"headline":"File upload in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2020-3436","kev_date_added":null,"published":"2020-10-21"},{"cvss_score":8.6,"headline":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2020-3528","kev_date_added":null,"published":"2020-10-21"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-07","vendors":["Cisco"]},"summary":"Remote attackers can cause network disruption by poisoning MAC address tables on Cisco ASA or FTD devices operating in transparent mode.","url":"https://insights.sbomify.com/CVE-2021-34793/"}