{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-22955 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-22955 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-22955 is a high-severity denial of service vulnerability in Citrix ADC, Citrix Gateway, published on 7 Dec 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-2021-22955 and fix it if it is affected.\n\nWhat it is: CVE-2021-22955 is a high-severity denial of service vulnerability in Citrix ADC, Citrix Gateway, published on 7 Dec 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-2021-22955 in the wild and no public exploit code.\n\nAffected product: Citrix ADC, Citrix Gateway. 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-2021-22955/ (Markdown: https://insights.sbomify.com/CVE-2021-22955/index.md)","id":"CVE-2021-22955","markdown":"https://insights.sbomify.com/CVE-2021-22955/index.md","name":"CVE-2021-22955","record":{"aliases":["GHSA-xwgf-rg8j-2j5x"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Citrix ADC Gateway","requires_auth":"none","summary":"Unauthenticated attackers can cause temporary disruption of management interfaces and APIs in Citrix ADC when configured as a VPN or AAA virtual server.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"application_delivery_controller_firmware","vendor":"citrix"},{"product":"gateway","vendor":"citrix"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"A unauthenticated denial of service vulnerability exists in Citrix ADC \u003c13.0-83.27, \u003c12.1-63.22 and 11.1-65.23 when configured as a VPN (Gateway) or AAA virtual server could allow an attacker to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.","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 Citrix ADC, Citrix Gateway","id":"CVE-2021-22955","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Citrix ADC, Citrix Gateway, Citrix SDWAN","id":"CVE-2021-22956"},"packages":[],"prev":{"headline":"Cross Site Request Forgery in concrete5/concrete5","id":"CVE-2021-22954"},"products":["Citrix ADC, Citrix Gateway"],"published":"2021-12-07","related":[{"cvss_score":9.8,"headline":"Citrix Application Delivery Controller (ADC) and Gateway Authentication Bypass","id":"CVE-2022-27518","kev_date_added":"2022-12-13","published":"2022-12-13"},{"cvss_score":9.8,"headline":"Citrix ADC, Gateway, and SD-WAN WANOP Appliance Code Execution","id":"CVE-2019-19781","kev_date_added":"2021-11-03","published":"2019-12-27"},{"cvss_score":6.5,"headline":"Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass","id":"CVE-2020-8193","kev_date_added":"2021-11-03","published":"2020-07-10"},{"cvss_score":6.5,"headline":"Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure","id":"CVE-2020-8195","kev_date_added":"2021-11-03","published":"2020-07-10"},{"cvss_score":4.3,"headline":"Citrix ADC, Gateway, and SD-WAN WANOP Appliance Information Disclosure","id":"CVE-2020-8196","kev_date_added":"2021-11-03","published":"2020-07-10"},{"cvss_score":9.8,"headline":"Unauthorized access to Gateway user capabilities","id":"CVE-2022-27510","kev_date_added":null,"published":"2022-11-08"},{"cvss_score":9.8,"headline":"Auth bypass in n/a","id":"CVE-2019-18225","kev_date_added":null,"published":"2019-10-21"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Unauthenticated attackers can cause temporary disruption of management interfaces and APIs in Citrix ADC when configured as a VPN or AAA virtual server.","url":"https://insights.sbomify.com/CVE-2021-22955/"}