CVE-2020-11080
Published: 3 June 2020
In nghttp2 before version 1.41.0, the overly large HTTP/2 SETTINGS frame payload causes denial of service. The proof of concept attack involves a malicious client constructing a SETTINGS frame with a length of 14,400 bytes (2400 individual settings entries) over and over again. The attack causes the CPU to spike at 100%. nghttp2 v1.41.0 fixes this vulnerability. There is a workaround to this vulnerability. Implement nghttp2_on_frame_recv_callback callback, and if received frame is SETTINGS frame and the number of settings entries are large (e.g., > 32), then drop the connection.
Notes
| Author | Note |
|---|---|
| sahnaseredini | nodejs uses system nghttp2 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
nodejs Launchpad, Ubuntu, Debian |
groovy |
Ignored
(end of life)
|
| jammy |
Not vulnerable
(code-not-compiled)
|
|
| impish |
Ignored
(end of life)
|
|
| kinetic |
Not vulnerable
(code-not-compiled)
|
|
| lunar |
Not vulnerable
(code-not-compiled)
|
|
| bionic |
Not vulnerable
(code-not-compiled)
|
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Not vulnerable
(code-not-compiled)
|
|
| hirsute |
Ignored
(end of life)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
| mantic |
Needs triage
|
|
|
nghttp2 Launchpad, Ubuntu, Debian |
bionic |
Released
(1.30.0-1ubuntu1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
| focal |
Released
(1.40.0-1ubuntu0.1)
|
|
| jammy |
Not vulnerable
(1.43.0-1build3)
|
|
| kinetic |
Not vulnerable
(1.49.0-1)
|
|
| lunar |
Not vulnerable
(1.52.0-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(1.7.1-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
|
| mantic |
Not vulnerable
(1.53.0-1)
|
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-2020-11080
- https://nodejs.org/en/blog/vulnerability/june-2020-security-releases/#http-2-large-settings-frame-dos-low-cve-2020-11080
- https://github.com/nghttp2/nghttp2/commit/336a98feb0d56b9ac54e12736b18785c27f75090
- https://github.com/nghttp2/nghttp2/commit/f8da73bd042f810f34d19f9eae02b46d870af394
- https://github.com/nghttp2/nghttp2/security/advisories/GHSA-q5wr-xfw9-q7xr
- https://ubuntu.com/security/notices/USN-6142-1
- NVD
- Launchpad
- Debian