Description

nghttp2 is an implementation of the Hypertext Transfer Protocol version 2 in C. The nghttp2 library prior to version 1.61.0 keeps reading the unbounded number of HTTP/2 CONTINUATION frames even after a stream is reset to keep HPACK context in sync. This causes excessive CPU usage to decode HPACK stream. nghttp2 v1.61.0 mitigates this vulnerability by limiting the number of CONTINUATION frames it accepts per stream. There is no workaround for this vulnerability.

Classification

CVE ID: CVE-2024-28182

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.3

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Products

Vendor: nghttp2

Product: nghttp2

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 16.01% (scored less or equal to compared to others)

EPSS Date: 2025-03-14 (when was this score calculated)

References

https://github.com/nghttp2/nghttp2/security/advisories/GHSA-x6x3-gv8h-m57q
https://github.com/nghttp2/nghttp2/commit/00201ecd8f982da3b67d4f6868af72a1b03b14e0
https://github.com/nghttp2/nghttp2/commit/d71a4668c6bead55805d18810d633fbb98315af9
https://lists.fedoraproject.org/archives/list/[email protected]/message/AGOME6ZXJG7664IPQNVE3DL67E3YP3HY/
https://lists.fedoraproject.org/archives/list/[email protected]/message/J6ZMXUGB66VAXDW5J6QSTHM5ET25FGSA/
https://lists.fedoraproject.org/archives/list/[email protected]/message/PXJO2EASHM2OQQLGVDY5ZSO7UVDVHTDK/
https://lists.debian.org/debian-lts-announce/2024/04/msg00026.html
http://www.openwall.com/lists/oss-security/2024/04/03/16

Timeline