{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2018-20340 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2018-20340 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Mar 2019. 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-2018-20340 and fix it if it is affected.\n\nWhat it is: CVE-2018-20340 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Mar 2019. 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-2018-20340 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. 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-2018-20340/ (Markdown: https://insights.sbomify.com/CVE-2018-20340/index.md)","id":"CVE-2018-20340","markdown":"https://insights.sbomify.com/CVE-2018-20340/index.md","name":"CVE-2018-20340","record":{"aliases":["DEBIAN-CVE-2018-20340","DSA-4389-1","GHSA-rc58-rfcj-mcrr","SUSE-SU-2019:1340-1","UBUNTU-CVE-2018-20340","openSUSE-SU-2019:1475-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"U2F host library","requires_auth":"none","summary":"A malicious USB device can trigger a buffer overflow in the libu2f-host library, potentially allowing remote code execution on the host system.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"libu2f-host","vendor":"yubico"}],"cvss":{"score":6.8,"severity":"medium","source":"nvd","vector":"CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.","ecosystems":["SUSE:Linux Enterprise Module for Basesystem 15","openSUSE:Leap 15.0","openSUSE:Leap 15.1"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Memory corruption in n/a","id":"CVE-2018-20340","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux"],"type":"memory_corruption","year":"2018"},"n_packages":3,"n_references":6,"next":{"headline":"Privilege escalation in n/a","id":"CVE-2018-20341"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15","fixed":["1.1.6-3.3.3"],"introduced":["0"],"last_affected":[],"package":"libu2f-host","purl":"pkg:rpm/suse/libu2f-host\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015","source":"SUSE-SU-2019:1340-1"},{"ecosystem":"openSUSE:Leap 15.0","fixed":["1.1.6-lp151.2.3.1"],"introduced":["0"],"last_affected":[],"package":"libu2f-host","purl":"pkg:rpm/opensuse/libu2f-host\u0026distro=openSUSE%20Leap%2015.0","source":"openSUSE-SU-2019:1475-1"},{"ecosystem":"openSUSE:Leap 15.1","fixed":["1.1.6-lp151.2.3.1"],"introduced":["0"],"last_affected":[],"package":"libu2f-host","purl":"pkg:rpm/opensuse/libu2f-host\u0026distro=openSUSE%20Leap%2015.1","source":"openSUSE-SU-2019:1475-1"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2018-20339"},"products":["n/a"],"published":"2019-03-17","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"2024-08-05","vendors":["n/a"]},"summary":"A malicious USB device can trigger a buffer overflow in the libu2f-host library, potentially allowing remote code execution on the host system.","url":"https://insights.sbomify.com/CVE-2018-20340/"}