{"answers":{"affected":"It affects 20 products.","exploited":"There is no known exploitation of CVE-2019-9511 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2019-9511 is a high-severity denial of service vulnerability in Apache Traffic Server, published on 13 Aug 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-2019-9511 and fix it if it is affected.\n\nWhat it is: CVE-2019-9511 is a high-severity denial of service vulnerability in Apache Traffic Server, published on 13 Aug 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-2019-9511 in the wild and no public exploit code.\n\nAffected product: Apache Traffic Server. 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-2019-9511/ (Markdown: https://insights.sbomify.com/CVE-2019-9511/index.md)","id":"CVE-2019-9511","markdown":"https://insights.sbomify.com/CVE-2019-9511/index.md","name":"CVE-2019-9511","record":{"aliases":["ALPINE-CVE-2019-9511","CLEANSTART-2024-IW99789","CLEANSTART-2026-BU08584","CLEANSTART-2026-LU76870","DEBIAN-CVE-2019-9511","GHSA-89fc-749h-w2fj","UBUNTU-CVE-2019-9511"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"HTTP/2 server implementation","requires_auth":"none","summary":"Attackers can cause denial of service in HTTP/2 servers by manipulating window sizes and stream priorities to exhaust CPU and memory resources.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"certcc","cpe":[{"product":"traffic_server","vendor":"apache"},{"product":"swiftnio","vendor":"apple"},{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"nginx","vendor":"f5"},{"product":"fedora","vendor":"fedoraproject"},{"product":"web_gateway","vendor":"mcafee"},{"product":"node.js","vendor":"nodejs"},{"product":"leap","vendor":"opensuse"},{"product":"enterprise_communications_broker","vendor":"oracle"},{"product":"graalvm","vendor":"oracle"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"jboss_core_services","vendor":"redhat"},{"product":"jboss_enterprise_application_platform","vendor":"redhat"},{"product":"openshift_service_mesh","vendor":"redhat"},{"product":"quay","vendor":"redhat"},{"product":"software_collections","vendor":"redhat"},{"product":"diskstation_manager","vendor":"synology"},{"product":"skynas","vendor":"synology"},{"product":"vs960hd_firmware","vendor":"synology"}],"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-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2020-12-22","github_poc":2,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2020-12-22T10:16:11Z","kind":"github_poc","ref":"https://github.com/flyniu666/ingress-nginx-0.21-1.19.5","stars":1,"title":"based on nginx 1.19.5 to fix for CVE-2018-16843, CVE-2018-16844, CVE-2019-9511, CVE-2019-9513, and CVE-2019-9516"},{"date":"2026-04-29T20:54:56Z","kind":"github_poc","ref":"https://github.com/harley-ghostie/CVE-2019-9511_Priority-Churn-Data-Dribble","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Denial of service in n/a","id":"CVE-2019-9511","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"apache:traffic_server","products":["apache:traffic_server","canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","nodejs:node.js","opensuse:leap","oracle:graalvm","redhat:enterprise_linux","redhat:jboss_enterprise_application_platform","redhat:software_collections","synology:diskstation_manager"],"type":"denial_of_service","year":"2019"},"n_packages":0,"n_references":47,"next":{"headline":"Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service","id":"CVE-2019-9512"},"packages":[],"prev":{"headline":"Microsoft Windows RDP can bypass the Windows lock screen","id":"CVE-2019-9510"},"products":["n/a"],"published":"2019-08-13","related":[{"cvss_score":10,"headline":"Other in n/a","id":"CVE-2014-3525","kev_date_added":null,"published":"2014-08-22"},{"cvss_score":9.8,"headline":"heap-buffer-overflow with stats-over-http plugin","id":"CVE-2021-43082","kev_date_added":null,"published":"2021-11-03"},{"cvss_score":9.8,"headline":"Dynamic stack buffer overflow in cachekey plugin","id":"CVE-2021-35474","kev_date_added":null,"published":"2021-06-30"},{"cvss_score":9.8,"headline":"Other in Apache Traffic Server","id":"CVE-2019-17559","kev_date_added":null,"published":"2020-03-23"},{"cvss_score":9.8,"headline":"Other in Apache Traffic Server","id":"CVE-2019-17565","kev_date_added":null,"published":"2020-03-23"},{"cvss_score":9.8,"headline":"Other in Apache Traffic Server","id":"CVE-2020-1944","kev_date_added":null,"published":"2020-03-23"},{"cvss_score":9.8,"headline":"Security feature bypass in n/a","id":"CVE-2014-3624","kev_date_added":null,"published":"2017-10-30"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"Attackers can cause denial of service in HTTP/2 servers by manipulating window sizes and stream priorities to exhaust CPU and memory resources.","url":"https://insights.sbomify.com/CVE-2019-9511/"}