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CVE-2019-9511

Status Candidate

Overview

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.

Related Files

Debian Security Advisory 4505-1
Posted Aug 22, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4505-1 - Three vulnerabilities were discovered in the HTTP/2 code of Nginx, a high-performance web and reverse proxy server, which could result in denial of service.

tags | advisory, web, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2019-9511, CVE-2019-9513, CVE-2019-9516
SHA-256 | 38817d6cbe881d7e08349f61c5c128eb23f57ca935723613ecd58131d5bef764
Download | Favorite | View
Ubuntu Security Notice USN-4099-1
Posted Aug 15, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4099-1 - Jonathan Looney discovered that nginx incorrectly handled the HTTP/2 implementation. A remote attacker could possibly use this issue to consume resources, leading to a denial of service.

tags | advisory, remote, web, denial of service
systems | linux, ubuntu
advisories | CVE-2019-9511
SHA-256 | 865f978ed5a19c9067c988ea171367de190ac9dfa56f46fe0cb52abb57a87e0c
Download | Favorite | View
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