{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-20266 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-20266 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 30 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20266 and fix it if it is affected.\n\nWhat it is: CVE-2021-20266 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 30 Apr 2021. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-20266 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-2021-20266/ (Markdown: https://insights.sbomify.com/CVE-2021-20266/index.md)","id":"CVE-2021-20266","markdown":"https://insights.sbomify.com/CVE-2021-20266/index.md","name":"CVE-2021-20266","record":{"aliases":["ALSA-2021:4489","DEBIAN-CVE-2021-20266","GHSA-8vf3-43pf-v3cq","RHSA-2021:4489","RLSA-2021:4489","UBUNTU-CVE-2021-20266"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"RPM package manager","requires_auth":"high_privilege","summary":"An attacker with rpmdb modification access can trigger an out-of-bounds read in RPM, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"rpm","vendor":"rpm"}],"cvss":{"score":4.9,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"A flaw was found in RPM's hdrblobInit() in lib/header.c. This flaw allows an attacker who can modify the rpmdb to cause an out-of-bounds read. The highest threat from this vulnerability is to system availability.","ecosystems":["AlmaLinux:8","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::baseos","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":"Denial of service in rpm","id":"CVE-2021-20266","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora"],"type":"denial_of_service","year":"2021"},"n_packages":46,"n_references":4,"next":{"headline":"Openstack Neutron has Insufficient Verification of IPv6 addresses","id":"CVE-2021-20267"},"packages":[{"ecosystem":"AlmaLinux:8","fixed":["4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build","purl":"pkg:rpm/almalinux/rpm-build","source":"ALSA-2021:4489"},{"ecosystem":"AlmaLinux:8","fixed":["4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-fapolicyd","purl":"pkg:rpm/almalinux/rpm-plugin-fapolicyd","source":"ALSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"python3-rpm-debuginfo","purl":"pkg:rpm/redhat/python3-rpm-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build","purl":"pkg:rpm/redhat/rpm-build","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build-debuginfo","purl":"pkg:rpm/redhat/rpm-build-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build-libs-debuginfo","purl":"pkg:rpm/redhat/rpm-build-libs-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-debuginfo","purl":"pkg:rpm/redhat/rpm-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-debugsource","purl":"pkg:rpm/redhat/rpm-debugsource","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-devel-debuginfo","purl":"pkg:rpm/redhat/rpm-devel-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-libs-debuginfo","purl":"pkg:rpm/redhat/rpm-libs-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-fapolicyd","purl":"pkg:rpm/redhat/rpm-plugin-fapolicyd","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-fapolicyd-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-fapolicyd-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-ima-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-ima-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-prioreset-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-prioreset-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-selinux-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-selinux-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-syslog-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-syslog-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-systemd-inhibit-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-systemd-inhibit-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-sign-debuginfo","purl":"pkg:rpm/redhat/rpm-sign-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"python3-rpm","purl":"pkg:rpm/redhat/python3-rpm","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"python3-rpm-debuginfo","purl":"pkg:rpm/redhat/python3-rpm-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm","purl":"pkg:rpm/redhat/rpm","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-apidocs","purl":"pkg:rpm/redhat/rpm-apidocs","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build-debuginfo","purl":"pkg:rpm/redhat/rpm-build-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build-libs","purl":"pkg:rpm/redhat/rpm-build-libs","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-build-libs-debuginfo","purl":"pkg:rpm/redhat/rpm-build-libs-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-cron","purl":"pkg:rpm/redhat/rpm-cron","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-debuginfo","purl":"pkg:rpm/redhat/rpm-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-debugsource","purl":"pkg:rpm/redhat/rpm-debugsource","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-devel","purl":"pkg:rpm/redhat/rpm-devel","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-devel-debuginfo","purl":"pkg:rpm/redhat/rpm-devel-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-libs","purl":"pkg:rpm/redhat/rpm-libs","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-libs-debuginfo","purl":"pkg:rpm/redhat/rpm-libs-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-fapolicyd-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-fapolicyd-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-ima","purl":"pkg:rpm/redhat/rpm-plugin-ima","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-ima-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-ima-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-prioreset","purl":"pkg:rpm/redhat/rpm-plugin-prioreset","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-prioreset-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-prioreset-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-selinux","purl":"pkg:rpm/redhat/rpm-plugin-selinux","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-selinux-debuginfo","purl":"pkg:rpm/redhat/rpm-plugin-selinux-debuginfo","source":"RHSA-2021:4489"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.14.3-19.el8"],"introduced":["0"],"last_affected":[],"package":"rpm-plugin-syslog","purl":"pkg:rpm/redhat/rpm-plugin-syslog","source":"RHSA-2021:4489"}],"prev":{"headline":"Denial of service in kernel","id":"CVE-2021-20265"},"products":["rpm"],"published":"2021-04-30","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":"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":"2024-08-03","vendors":["n/a"]},"summary":"An attacker with rpmdb modification access can trigger an out-of-bounds read in RPM, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2021-20266/"}