{"answers":{"affected":"It affects 11 products.","exploited":"There is no known exploitation of CVE-2021-34791 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-34791 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-34791 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, published on 27 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-34791 and fix it if it is affected.\n\nWhat it is: CVE-2021-34791 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, published on 27 Oct 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-34791 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-2021-34791/ (Markdown: https://insights.sbomify.com/CVE-2021-34791/index.md)","id":"CVE-2021-34791","markdown":"https://insights.sbomify.com/CVE-2021-34791/index.md","name":"CVE-2021-34791","record":{"aliases":["GHSA-qhq7-rm64-qh84"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco ASA/FTD firewall","requires_auth":"none","summary":"Unauthenticated remote attackers can bypass the Application Level Gateway to open unauthorized connections to hosts behind the firewall.","user_interaction":"required","vuln_class":"security_feature_bypass"},"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":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"},{"id":"CWE-358","name":"Improperly Implemented Security Check for Standard"}],"description":"Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. For more information about these vulnerabilities, see the Details section of this advisory. Note: These vulnerabilities have been publicly discussed as NAT Slipstreaming.","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":"Security feature bypass in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-34791","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":"security_feature_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-34792"},"packages":[],"prev":{"headline":"Security feature bypass in Cisco Adaptive Security Appliance (ASA) Software","id":"CVE-2021-34790"},"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-2021-34793","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-2021-40117","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-07","vendors":["Cisco"]},"summary":"Unauthenticated remote attackers can bypass the Application Level Gateway to open unauthorized connections to hosts behind the firewall.","url":"https://insights.sbomify.com/CVE-2021-34791/"}