{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-4397 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-4397 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-4397 is a medium-severity memory corruption vulnerability in Zyxel  USG FLEX 50(W) series firmware, published on 28 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-4397 and fix it if it is affected.\n\nWhat it is: CVE-2023-4397 is a medium-severity memory corruption vulnerability in Zyxel  USG FLEX 50(W) series firmware, published on 28 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-4397 in the wild and no public exploit code.\n\nAffected product: Zyxel  USG FLEX 50(W) series firmware. 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-2023-4397/ (Markdown: https://insights.sbomify.com/CVE-2023-4397/index.md)","id":"CVE-2023-4397","markdown":"https://insights.sbomify.com/CVE-2023-4397/index.md","name":"CVE-2023-4397","record":{"aliases":["GHSA-rx6q-hj2g-x8wp"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Zyxel firewall firmware","requires_auth":"high_privilege","summary":"An authenticated administrator can cause a denial-of-service condition on Zyxel firewalls by executing CLI commands with crafted strings.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Zyxel","cpe":[{"product":"zld","vendor":"zyxel"}],"cvss":{"score":4.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"A buffer overflow vulnerability in the Zyxel ATP series firmware version 5.37, USG FLEX series firmware version 5.37, USG FLEX 50(W) series firmware version 5.37, and USG20(W)-VPN series firmware version 5.37, could allow an authenticated local attacker with administrator privileges to cause denial-of-service (DoS) conditions by executing the CLI command with crafted strings on an affected device.","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":"Memory corruption in USG FLEX 50(W) series firmware","id":"CVE-2023-4397","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"Integer overflow in ATP series firmware","id":"CVE-2023-4398"},"packages":[],"prev":{"headline":"Cross-site Scripting (XSS) - Stored in cockpit-hq/cockpit","id":"CVE-2023-4395"},"products":[" USG FLEX 50(W) series firmware","ATP series firmware","USG FLEX series firmware","USG20(W)-VPN series firmware"],"published":"2023-11-28","related":[{"cvss_score":7.5,"headline":"Zyxel Multiple Firewalls Path Traversal","id":"CVE-2024-11667","kev_date_added":"2024-12-03","published":"2024-11-27"},{"cvss_score":8.1,"headline":"Missing authorization in ATP series firmware","id":"CVE-2025-9133","kev_date_added":null,"published":"2025-10-21"},{"cvss_score":8.1,"headline":"Command injection in ATP series firmware","id":"CVE-2024-42057","kev_date_added":null,"published":"2024-09-03"},{"cvss_score":7.5,"headline":"Null dereference in ATP series firmware","id":"CVE-2024-42058","kev_date_added":null,"published":"2024-09-03"},{"cvss_score":7.5,"headline":"Integer overflow in ATP series firmware","id":"CVE-2023-4398","kev_date_added":null,"published":"2023-11-28"},{"cvss_score":7.2,"headline":"Command injection in ATP series firmware","id":"CVE-2025-8078","kev_date_added":null,"published":"2025-10-21"},{"cvss_score":7.2,"headline":"Command injection in ATP series firmware","id":"CVE-2024-42059","kev_date_added":null,"published":"2024-09-03"}],"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":"2024-08-02","vendors":["Zyxel"]},"summary":"An authenticated administrator can cause a denial-of-service condition on Zyxel firewalls by executing CLI commands with crafted strings.","url":"https://insights.sbomify.com/CVE-2023-4397/"}