{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-27121 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-27121 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-27121 is a medium-severity denial of service vulnerability in Cisco Unified Communications Manager IM and Presence Service, published on 6 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-27121 and fix it if it is affected.\n\nWhat it is: CVE-2020-27121 is a medium-severity denial of service vulnerability in Cisco Unified Communications Manager IM and Presence Service, published on 6 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-27121 in the wild and no public exploit code.\n\nAffected product: Cisco Unified Communications Manager IM and Presence Service. 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-2020-27121/ (Markdown: https://insights.sbomify.com/CVE-2020-27121/index.md)","id":"CVE-2020-27121","markdown":"https://insights.sbomify.com/CVE-2020-27121/index.md","name":"CVE-2020-27121","record":{"aliases":["GHSA-7c3f-h49g-4mg6"],"analysis":{"component_type":"server_software","fix_type":"workaround","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Unified CM IM\u0026P","requires_auth":"low_privilege","summary":"An authenticated remote attacker can crash the authentication service via crafted login requests, causing a denial of service for new logins.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"unified_communications_manager_im_and_presence_service","vendor":"cisco"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions"},{"id":"CWE-248","name":"Uncaught Exception"}],"description":"A vulnerability in Cisco Unified Communications Manager IM \u0026amp; Presence Service (Unified CM IM\u0026amp;P) Software could allow an authenticated, remote attacker to cause the Cisco XCP Authentication Service on an affected device to restart, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of login requests. An attacker could exploit this vulnerability by sending a crafted client login request to an affected device. A successful exploit could allow the attacker to cause a process to crash, resulting in a DoS condition for new login attempts. Users who are authenticated at the time of the attack would not be affected. There are workarounds that address this vulnerability.","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 Unified Communications Manager IM and Presence Service Denial of Service Vulnerability","id":"CVE-2020-27121","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Identity Services Engine Privilege Escalation Vulnerability","id":"CVE-2020-27122"},"packages":[],"prev":{"headline":"Auth bypass in Android","id":"CVE-2020-27098"},"products":["Cisco Unified Communications Manager IM and Presence Service"],"published":"2020-11-06","related":[{"cvss_score":8.8,"headline":"Cross-site request forgery in Cisco Unified Communications Manager IM \u0026 Presence Service unknown","id":"CVE-2018-0363","kev_date_added":null,"published":"2018-06-21"},{"cvss_score":7.5,"headline":"Denial of service in Cisco Unified Communications Manager IM and Presence Service","id":"CVE-2023-20108","kev_date_added":null,"published":"2023-06-28"},{"cvss_score":7.5,"headline":"Information disclosure in Cisco Unified Communications Manager","id":"CVE-2016-6464","kev_date_added":null,"published":"2016-12-14"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2016-1466","kev_date_added":null,"published":"2016-08-08"},{"cvss_score":7.1,"headline":"Cisco Unified Communications Manager IM \u0026 Presence Service SQL Injection Vulnerabilities","id":"CVE-2021-1363","kev_date_added":null,"published":"2021-05-06"},{"cvss_score":7.1,"headline":"Cisco Unified Communications Manager IM \u0026 Presence Service SQL Injection Vulnerabilities","id":"CVE-2021-1365","kev_date_added":null,"published":"2021-05-06"},{"cvss_score":6.5,"headline":"Cisco Unified Communications Manager IM \u0026 Presence Service Information Disclosure Vulnerability","id":"CVE-2024-20457","kev_date_added":null,"published":"2024-11-06"}],"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":"2024-11-13","vendors":["Cisco"]},"summary":"An authenticated remote attacker can crash the authentication service via crafted login requests, causing a denial of service for new logins.","url":"https://insights.sbomify.com/CVE-2020-27121/"}