CVE-2020-11080
Published: 03 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.
Priority
Medium
CVSS 3 base score: 7.5
Status
| Package | Release | Status |
|---|---|---|
|
nodejs Launchpad, Ubuntu, Debian |
Upstream |
Needs triage
|
| Ubuntu 21.04 (Hirsute Hippo) |
Needs triage
|
|
| Ubuntu 20.04 LTS (Focal Fossa) |
Needs triage
|
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Needs triage
|
|
| Ubuntu 16.04 ESM (Xenial Xerus) |
Ignored
(end of standard support, was needs-triage)
|
|
| Ubuntu 14.04 ESM (Trusty Tahr) |
Needs triage
|
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
- NVD
- Launchpad
- Debian