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CVE-2019-9516

Published: 13 August 2019

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.

Notes

AuthorNote
sbeattie
nginx added http2 support in 1.9.5
Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
nginx
Launchpad, Ubuntu, Debian
bionic
Released (1.14.0-0ubuntu1.4)
cosmic Needed

disco
Released (1.15.9-0ubuntu1.1)
precise Does not exist

trusty Not vulnerable
(http2 support not implemented)
upstream Needs triage

xenial
Released (1.10.3-0ubuntu0.16.04.4)
Patches:
upstream: https://github.com/nginx/nginx/commit/dbdd9ffea81d9db46fb88b5eba828f2ad080d388