CVE-2024-27316

high

Description

HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion.

References

https://httpd.apache.org/security/vulnerabilities_24.html

https://www.cisa.gov/news-events/ics-advisories/icsa-24-319-04

https://nowotarski.info/http2-continuation-flood/

https://kb.cert.org/vuls/id/421644

https://www.openwall.com/lists/oss-security/2024/04/03/16

https://www.kb.cert.org/vuls/id/421644

https://support.apple.com/kb/HT214119

https://security.netapp.com/advisory/ntap-20240415-0013/

https://lists.fedoraproject.org/archives/list/[email protected]/message/MIUBKSCJGPJ6M2U63V6BKFDF725ODLG7/

https://lists.fedoraproject.org/archives/list/[email protected]/message/FO73U3SLBYFGIW2YKXOK7RI4D6DJSZ2B/

https://lists.debian.org/debian-lts-announce/2024/05/msg00013.html

http://www.openwall.com/lists/oss-security/2024/04/04/4

http://seclists.org/fulldisclosure/2024/Jul/18

Details

Source: Mitre, NVD

Published: 2024-04-04

Updated: 2025-11-04

Named Vulnerability: HTTP/2 CONTINUATION Flood

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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