CVE-2019-9518
Published: 13 August 2019
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.
From the Ubuntu Security Team
It was discovered that Netty incorrectly implements HTTP/2. An attacker could possibly use this issue to cause a denial of service.
Priority
Status
Package | Release | Status |
---|---|---|
netty Launchpad, Ubuntu, Debian |
kinetic |
Ignored
(end of life, was needed)
|
bionic |
Released
(1:4.1.7-4ubuntu0.1+esm1)
Available with Ubuntu Pro |
|
disco |
Ignored
(end of life)
|
|
eoan |
Ignored
(end of life)
|
|
focal |
Needed
|
|
trusty |
Not vulnerable
(code not preent)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(code not present)
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Ignored
(end of life)
|
|
jammy |
Needed
|
|
lunar |
Needed
|
|
mantic |
Needed
|
|
trafficserver Launchpad, Ubuntu, Debian |
kinetic |
Ignored
(end of life, was needs-triage)
|
bionic |
Needs triage
|
|
focal |
Not vulnerable
(8.0.5+ds-3)
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
impish |
Ignored
(end of life)
|
|
jammy |
Needs triage
|
|
lunar |
Needs triage
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
mantic |
Needs triage
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9518
- https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
- https://netty.io/news/2019/08/13/4-1-39-Final.html
- https://github.com/netty/netty/pull/9461
- https://ubuntu.com/security/notices/USN-4866-1
- NVD
- Launchpad
- Debian