{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-3448 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-3448 is a medium-severity vulnerability in Fedoraproject Fedora, published on 8 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3448 and fix it if it is affected.\n\nWhat it is: CVE-2021-3448 is a medium-severity vulnerability in Fedoraproject Fedora, published on 8 Apr 2021. 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-2021-3448 in the wild and no public exploit code.\n\nAffected product: Fedoraproject Fedora. 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-2021-3448/ (Markdown: https://insights.sbomify.com/CVE-2021-3448/index.md)","id":"CVE-2021-3448","markdown":"https://insights.sbomify.com/CVE-2021-3448/index.md","name":"CVE-2021-3448","record":{"aliases":["ALPINE-CVE-2021-3448","ALSA-2021:4153","CLEANSTART-2026-EO77574","DEBIAN-CVE-2021-3448","GHSA-vvf4-c8p4-89v5","MGASA-2021-0231","OESA-2021-1189","RHSA-2021:4153","RLSA-2021:4153","UBUNTU-CVE-2021-3448","USN-4976-1","USN-4976-2"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"DNS forwarder","requires_auth":"none","summary":"An attacker can forge DNS replies to poison the cache if dnsmasq is configured with fixed forwarding ports, compromising data integrity.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"communications_cloud_native_core_network_function_cloud_native_environment","vendor":"oracle"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"dnsmasq","vendor":"thekelleys"}],"cvss":{"score":4,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-358","name":"Improperly Implemented Security Check for Standard"}],"description":"A flaw was found in dnsmasq in versions before 2.85. When configured to use a specific server for a given network interface, dnsmasq uses a fixed port while forwarding queries. An attacker on the network, able to find the outgoing port used by dnsmasq, only needs to guess the random transmission ID to forge a reply and get it accepted by dnsmasq. This flaw makes a DNS Cache Poisoning attack much easier. The highest threat from this vulnerability is to data integrity.","ecosystems":["AlmaLinux:8","Red Hat:enterprise_linux:8::appstream","Rocky Linux:8"],"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":"Other in dnsmasq","id":"CVE-2021-3448","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora","redhat:enterprise_linux"],"type":"other","year":"2021"},"n_packages":8,"n_references":6,"next":{"headline":"NULL pointer deref in signature_algorithms processing","id":"CVE-2021-3449"},"packages":[{"ecosystem":"AlmaLinux:8","fixed":["2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq","purl":"pkg:rpm/almalinux/dnsmasq","source":"ALSA-2021:4153"},{"ecosystem":"AlmaLinux:8","fixed":["2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq-utils","purl":"pkg:rpm/almalinux/dnsmasq-utils","source":"ALSA-2021:4153"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq","purl":"pkg:rpm/redhat/dnsmasq","source":"RHSA-2021:4153"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq-debuginfo","purl":"pkg:rpm/redhat/dnsmasq-debuginfo","source":"RHSA-2021:4153"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq-debugsource","purl":"pkg:rpm/redhat/dnsmasq-debugsource","source":"RHSA-2021:4153"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq-utils","purl":"pkg:rpm/redhat/dnsmasq-utils","source":"RHSA-2021:4153"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq-utils-debuginfo","purl":"pkg:rpm/redhat/dnsmasq-utils-debuginfo","source":"RHSA-2021:4153"},{"ecosystem":"Rocky Linux:8","fixed":["0:2.79-19.el8"],"introduced":["0"],"last_affected":[],"package":"dnsmasq","purl":"pkg:rpm/rocky-linux/dnsmasq?distro=rocky-linux-8-5-legacy\u0026epoch=0","source":"RLSA-2021:4153"}],"prev":{"headline":"Information disclosure in ansible","id":"CVE-2021-3447"},"products":["dnsmasq"],"published":"2021-04-08","related":[{"cvss_score":9.8,"headline":"PHP-CGI OS Command Injection","id":"CVE-2024-4577","kev_date_added":"2024-06-12","published":"2024-06-09"},{"cvss_score":9.8,"headline":"Grafana Authentication Bypass","id":"CVE-2021-39226","kev_date_added":"2022-08-25","published":"2021-10-05"},{"cvss_score":9.8,"headline":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow","id":"CVE-2019-5544","kev_date_added":"2021-11-03","published":"2019-12-06"},{"cvss_score":9.6,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2024-4947","kev_date_added":"2024-05-20","published":"2024-05-15"},{"cvss_score":9.6,"headline":"Google Chromium Visuals Use-After-Free","id":"CVE-2024-4671","kev_date_added":"2024-05-13","published":"2024-05-09"},{"cvss_score":9.6,"headline":"Google Chromium Mojo Insufficient Data Validation","id":"CVE-2022-3075","kev_date_added":"2022-09-08","published":"2022-09-26"},{"cvss_score":9.6,"headline":"Google Chromium Indexed DB API Use-After-Free","id":"CVE-2021-30633","kev_date_added":"2021-11-03","published":"2021-10-08"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"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":"2025-12-03","vendors":["n/a"]},"summary":"An attacker can forge DNS replies to poison the cache if dnsmasq is configured with fixed forwarding ports, compromising data integrity.","url":"https://insights.sbomify.com/CVE-2021-3448/"}