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
| Author | Note |
|---|---|
| sbeattie | nginx added http2 support in 1.9.5 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
nginx Launchpad, Ubuntu, Debian |
bionic |
Released
(1.14.0-0ubuntu1.4)
|
| cosmic |
Ignored
(end of life, was needed)
|
|
| disco |
Released
(1.15.9-0ubuntu1.1)
|
|
| 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 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |