CVE-2020-11080

NameCVE-2020-11080
DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4696-1
NVD severitymedium
Debian Bugs962145

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
nodejs (PTS)stretch4.8.2~dfsg-1vulnerable
buster, buster (security)10.21.0~dfsg-1~deb10u1fixed
bullseye, sid12.19.0~dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
nodejssourcejessie(unfixed)end-of-life
nodejssourcebuster10.21.0~dfsg-1~deb10u1DSA-4696-1
nodejssource(unstable)10.21.0~dfsg-1962145

Notes

[stretch] - nodejs <ignored> (Nodejs in stretch not covered by security support)
[jessie] - nodejs <end-of-life> (Nodejs in jessie not covered by security support)
https://nodejs.org/en/blog/vulnerability/june-2020-security-releases/#http-2-large-settings-frame-dos-low-cve-2020-11080

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