{"id":"CVE-2019-9518","details":"Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.","modified":"2026-04-10T04:20:51.873823Z","published":"2019-08-13T21:15:13.003Z","related":["ALSA-2019:2925","MGASA-2020-0372","SUSE-SU-2019:14246-1","SUSE-SU-2019:2254-1","SUSE-SU-2019:2259-1","SUSE-SU-2019:2260-1","SUSE-SU-2020:0059-1","openSUSE-SU-2019:2114-1","openSUSE-SU-2019:2115-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/"},{"type":"WEB","url":"https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r99a625fb17032646d96cd23dec49603ff630e9318e44a686d63046bc%40%3Ccommits.cassandra.apache.org%3E"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/"},{"type":"WEB","url":"https://support.f5.com/csp/article/K46011592?utm_source=f5support&amp%3Butm_medium=RSS"},{"type":"WEB","url":"https://lists.apache.org/thread.html/2653c56545573b528f3f6352a29eccaf498bd6fb2a6a59568d81a61d%40%3Cannounce.trafficserver.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ff5b0821a6985159a832ff6d1a4bd311ac07ecc7db1e2d8bab619107%40%3Cdev.trafficserver.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd31230d01fa6aad18bdadc0720acd1747e53690bd35f73a48e7a9b75%40%3Ccommits.cassandra.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/091b518265bce56a16af87b77c8cfacda902a02079e866f9fdf13b61%40%3Cusers.trafficserver.apache.org%3E"},{"type":"ADVISORY","url":"https://support.f5.com/csp/article/K46011592"},{"type":"ADVISORY","url":"https://www.synology.com/security/advisory/Synology_SA_19_33"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2019/Aug/16"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:3892"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:4352"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2020:0727"},{"type":"ADVISORY","url":"https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2925"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2955"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20190823-0005/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4520"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:2939"},{"type":"ADVISORY","url":"https://kb.cert.org/vuls/id/605641/"},{"type":"ADVISORY","url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10296"},{"type":"ADVISORY","url":"https://seclists.org/bugtraq/2019/Aug/24"},{"type":"ADVISORY","url":"https://seclists.org/bugtraq/2019/Sep/18"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/trafficserver","events":[{"introduced":"27f8e2cda9133864e6ffae0224c799fde5f10290"},{"last_affected":"eaed59510bda6f1d27854d9d3f07aace2afffc16"},{"introduced":"6c1c6cf20e7d0e287d697a0f4181436013d17c30"},{"last_affected":"e249f4a2c70ead73b281948459eb6369b3cbfaa4"},{"introduced":"b310e3566f58dd04ec2b15b111ec86ea70e20019"},{"last_affected":"e92757040355baa6edc8896564e2e49d5232e149"}],"database_specific":{"versions":[{"introduced":"6.0.0"},{"last_affected":"6.2.3"},{"introduced":"7.0.0"},{"last_affected":"7.1.6"},{"introduced":"8.0.0"},{"last_affected":"8.0.3"}]}},{"type":"GIT","repo":"https://github.com/apple/swift-nio","events":[{"introduced":"4fb0cc68fee45d2ae714484b5979316943ef1f24"},{"last_affected":"d94ab56d58c8559ebe5d65cc35510f40f6cc2932"},{"introduced":"0"},{"last_affected":"4fb0cc68fee45d2ae714484b5979316943ef1f24"},{"introduced":"0"},{"last_affected":"4fb0cc68fee45d2ae714484b5979316943ef1f24"},{"introduced":"0"},{"last_affected":"4fb0cc68fee45d2ae714484b5979316943ef1f24"}],"database_specific":{"versions":[{"introduced":"1.0.0"},{"last_affected":"1.4.0"},{"introduced":"0"},{"last_affected":"1.0"},{"introduced":"0"},{"last_affected":"1.0"},{"introduced":"0"},{"last_affected":"1.0"}]}},{"type":"GIT","repo":"https://github.com/nodejs/node","events":[{"introduced":"0"},{"last_affected":"fa9990f3fb5b06fe94e294925246d2c136deb2c2"},{"introduced":"0"},{"last_affected":"cf41627411886000429bde058a6594fb7f6d6d47"},{"introduced":"0"},{"last_affected":"a4705f62def103757112b58bfe9a4ab9e2767284"},{"introduced":"0"},{"last_affected":"d683e3dda09b6b3cc6cad6fd2c106e3061a48f0d"},{"introduced":"0"},{"last_affected":"2291e079f22e6df1f7683a05d17364b2ab3bfdab"},{"introduced":"0"},{"last_affected":"c1aa949064892dbe693750686c06f4ad5673e577"},{"introduced":"0"},{"last_affected":"24a3d0e71b4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