{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2019-6477 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2019-6477 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 26 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-6477 and fix it if it is affected.\n\nWhat it is: CVE-2019-6477 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 26 Nov 2019. 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-2019-6477 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-2019-6477/ (Markdown: https://insights.sbomify.com/CVE-2019-6477/index.md)","id":"CVE-2019-6477","markdown":"https://insights.sbomify.com/CVE-2019-6477/index.md","name":"CVE-2019-6477","record":{"aliases":["ALPINE-CVE-2019-6477","DEBIAN-CVE-2019-6477","GHSA-6q2x-892r-7qm4","RHSA-2020:1845","UBUNTU-CVE-2019-6477","USN-4197-1"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"BIND9 DNS server","requires_auth":"none","summary":"Attackers can cause denial of service in BIND9 by sending TCP-pipelined queries that exhaust server resources, leading to unresponsiveness.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"isc","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"bind","vendor":"isc"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).","ecosystems":["Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::baseos"],"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":"TCP-pipelined queries can bypass tcp-clients limit","id":"CVE-2019-6477","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora","isc:bind"],"type":"denial_of_service","year":"2019"},"n_packages":38,"n_references":8,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2019-6478"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind","purl":"pkg:rpm/redhat/bind","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-chroot","purl":"pkg:rpm/redhat/bind-chroot","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-debuginfo","purl":"pkg:rpm/redhat/bind-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-debugsource","purl":"pkg:rpm/redhat/bind-debugsource","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-devel","purl":"pkg:rpm/redhat/bind-devel","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-export-libs-debuginfo","purl":"pkg:rpm/redhat/bind-export-libs-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-libs","purl":"pkg:rpm/redhat/bind-libs","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-libs-debuginfo","purl":"pkg:rpm/redhat/bind-libs-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-libs-lite","purl":"pkg:rpm/redhat/bind-libs-lite","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-libs-lite-debuginfo","purl":"pkg:rpm/redhat/bind-libs-lite-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-license","purl":"pkg:rpm/redhat/bind-license","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-lite-devel","purl":"pkg:rpm/redhat/bind-lite-devel","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11","purl":"pkg:rpm/redhat/bind-pkcs11","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-debuginfo","purl":"pkg:rpm/redhat/bind-pkcs11-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-devel","purl":"pkg:rpm/redhat/bind-pkcs11-devel","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-libs","purl":"pkg:rpm/redhat/bind-pkcs11-libs","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-libs-debuginfo","purl":"pkg:rpm/redhat/bind-pkcs11-libs-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-utils","purl":"pkg:rpm/redhat/bind-pkcs11-utils","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-utils-debuginfo","purl":"pkg:rpm/redhat/bind-pkcs11-utils-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-sdb","purl":"pkg:rpm/redhat/bind-sdb","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-sdb-chroot","purl":"pkg:rpm/redhat/bind-sdb-chroot","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-sdb-debuginfo","purl":"pkg:rpm/redhat/bind-sdb-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-utils","purl":"pkg:rpm/redhat/bind-utils","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-utils-debuginfo","purl":"pkg:rpm/redhat/bind-utils-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"python3-bind","purl":"pkg:rpm/redhat/python3-bind","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind","purl":"pkg:rpm/redhat/bind","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-debuginfo","purl":"pkg:rpm/redhat/bind-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-debugsource","purl":"pkg:rpm/redhat/bind-debugsource","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-export-devel","purl":"pkg:rpm/redhat/bind-export-devel","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-export-libs","purl":"pkg:rpm/redhat/bind-export-libs","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-export-libs-debuginfo","purl":"pkg:rpm/redhat/bind-export-libs-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-libs-debuginfo","purl":"pkg:rpm/redhat/bind-libs-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-libs-lite-debuginfo","purl":"pkg:rpm/redhat/bind-libs-lite-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-debuginfo","purl":"pkg:rpm/redhat/bind-pkcs11-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-libs-debuginfo","purl":"pkg:rpm/redhat/bind-pkcs11-libs-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-pkcs11-utils-debuginfo","purl":"pkg:rpm/redhat/bind-pkcs11-utils-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-sdb-debuginfo","purl":"pkg:rpm/redhat/bind-sdb-debuginfo","source":"RHSA-2020:1845"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["32:9.11.13-3.el8"],"introduced":["0"],"last_affected":[],"package":"bind-utils-debuginfo","purl":"pkg:rpm/redhat/bind-utils-debuginfo","source":"RHSA-2020:1845"}],"prev":{"headline":"An error in QNAME minimization code can cause BIND to exit with an assertion failure","id":"CVE-2019-6476"},"products":["BIND9"],"published":"2019-11-26","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":"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":"2024-09-16","vendors":["ISC"]},"summary":"Attackers can cause denial of service in BIND9 by sending TCP-pipelined queries that exhaust server resources, leading to unresponsiveness.","url":"https://insights.sbomify.com/CVE-2019-6477/"}