{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-3596 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-3596 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-3596 is a medium-severity denial of service vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 8 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-3596 and fix it if it is affected.\n\nWhat it is: CVE-2020-3596 is a medium-severity denial of service vulnerability in Cisco TelePresence Video Communication Server (VCS) Expressway, published on 8 Oct 2020. 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-2020-3596 in the wild and no public exploit code.\n\nAffected product: Cisco TelePresence Video Communication Server (VCS) Expressway. 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-2020-3596/ (Markdown: https://insights.sbomify.com/CVE-2020-3596/index.md)","id":"CVE-2020-3596","markdown":"https://insights.sbomify.com/CVE-2020-3596/index.md","name":"CVE-2020-3596","record":{"aliases":["GHSA-9c7p-6wrp-cw32"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Expressway/VCS","requires_auth":"none","summary":"Unauthenticated remote attackers can cause a denial of service by sending crafted SIP packets to Cisco Expressway or VCS devices, exhausting memory and crashing the system.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[{"product":"expressway","vendor":"cisco"},{"product":"telepresence_video_communication_server","vendor":"cisco"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-670","name":"Always-Incorrect Control Flow Implementation"},{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value"}],"description":"A vulnerability in the Session Initiation Protocol (SIP) of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of incoming SIP traffic. An attacker could exploit this vulnerability by sending a series of SIP packets to an affected device. A successful exploit could allow the attacker to exhaust memory on an affected device, causing it to crash and leading to a DoS condition.","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 Expressway Series and TelePresence Video Communication Server Denial of Service Vulnerability","id":"CVE-2020-3596","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 Nexus Data Broker Software Path Traversal Vulnerability","id":"CVE-2020-3597"},"packages":[],"prev":{"headline":"Cisco SD-WAN Software Privilege Escalation Vulnerability","id":"CVE-2020-3595"},"products":["Cisco TelePresence Video Communication Server (VCS) Expressway"],"published":"2020-10-08","related":[{"cvss_score":9.6,"headline":"Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway","id":"CVE-2024-20252","kev_date_added":null,"published":"2024-02-07"},{"cvss_score":9.6,"headline":"Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway","id":"CVE-2024-20254","kev_date_added":null,"published":"2024-02-07"},{"cvss_score":9,"headline":"Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities","id":"CVE-2022-20812","kev_date_added":null,"published":"2022-07-06"},{"cvss_score":9,"headline":"Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities","id":"CVE-2022-20813","kev_date_added":null,"published":"2022-07-06"},{"cvss_score":8.6,"headline":"Denial of service in Cisco Expressway Series Software and Cisco TelePresence VCS Software All versions prior to version X8.8.2 are vulnerable","id":"CVE-2017-3790","kev_date_added":null,"published":"2017-02-01"},{"cvss_score":8.2,"headline":"Cross-site request forgery in Cisco TelePresence Video Communication Server (VCS) Expressway","id":"CVE-2024-20255","kev_date_added":null,"published":"2024-02-07"},{"cvss_score":6.7,"headline":"Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability","id":"CVE-2021-34716","kev_date_added":null,"published":"2021-08-18"}],"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":"Unauthenticated remote attackers can cause a denial of service by sending crafted SIP packets to Cisco Expressway or VCS devices, exhausting memory and crashing the system.","url":"https://insights.sbomify.com/CVE-2020-3596/"}