{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2018-16855 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2018-16855 is a high-severity memory corruption vulnerability in Powerdns Recursor, published on 3 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-16855 and fix it if it is affected.\n\nWhat it is: CVE-2018-16855 is a high-severity memory corruption vulnerability in Powerdns Recursor, published on 3 Dec 2018. 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-2018-16855 in the wild and no public exploit code.\n\nAffected product: Powerdns Recursor. 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-2018-16855/ (Markdown: https://insights.sbomify.com/CVE-2018-16855/index.md)","id":"CVE-2018-16855","markdown":"https://insights.sbomify.com/CVE-2018-16855/index.md","name":"CVE-2018-16855","record":{"aliases":["DEBIAN-CVE-2018-16855","GHSA-qx96-6995-fgrp","UBUNTU-CVE-2018-16855"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"DNS recursor","requires_auth":"none","summary":"A remote attacker can cause a denial of service in PowerDNS Recursor by triggering an out-of-bounds memory read during DNS query processing.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"recursor","vendor":"powerdns"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.0"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"An issue has been found in PowerDNS Recursor before version 4.1.8 where a remote attacker sending a DNS query can trigger an out-of-bounds memory read while computing the hash of the query for a packet cache lookup, possibly leading to a crash.","ecosystems":[],"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 pdns-recursor","id":"CVE-2018-16855","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"powerdns:recursor","products":["powerdns:recursor"],"type":"memory_corruption","year":"2018"},"n_packages":0,"n_references":2,"next":{"headline":"Openstack Octavia allows Insertion of Sensitive Information into Log File","id":"CVE-2018-16856"},"packages":[],"prev":{"headline":"Moodle Login CSRF vulnerability in login form","id":"CVE-2018-16854"},"products":["pdns-recursor"],"published":"2018-12-03","related":[{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2009-4009","kev_date_added":null,"published":"2010-01-08"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2020-10030","kev_date_added":null,"published":"2020-05-19"},{"cvss_score":8.2,"headline":"Crafted delegations or IP fragments can poison cached delegations in Recursor","id":"CVE-2025-59023","kev_date_added":null,"published":"2026-02-09"},{"cvss_score":7.5,"headline":"Insufficient validation of incoming notifies over TCP can lead to a denial of service in Recursor","id":"CVE-2025-59030","kev_date_added":null,"published":"2025-12-09"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2023-22617","kev_date_added":null,"published":"2023-01-21"},{"cvss_score":7.5,"headline":"Other in n/a","id":"CVE-2009-4010","kev_date_added":null,"published":"2010-01-08"}],"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":"2024-08-05","vendors":["[UNKNOWN]"]},"summary":"A remote attacker can cause a denial of service in PowerDNS Recursor by triggering an out-of-bounds memory read during DNS query processing.","url":"https://insights.sbomify.com/CVE-2018-16855/"}