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AUSCERT External Security Bulletin Redistribution
ESB-2024.2068.2
Apache HTTP Server: HTTP/2 DoS by memory exhaustion on endless continuation
frames
5 April 2024
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AusCERT Security Bulletin Summary
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Product: Apache HTTP Server
Publisher: Apache Software Foundation
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2024-27316
Original Bulletin:
https://httpd.apache.org/security/vulnerabilities_24.html
Comment: CVSS (Max): 7.5 CVE-2024-27316 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Revision History: April 5 2024: Fixed formatting issue
April 05 2024: Initial Release
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Severity: moderate
Affected versions:
- Apache HTTP Server 2.4.17 through 2.4.58
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.
Credit:
Bartek Nowotarski (https://nowotarski.info/) (finder)
References:
https://httpd.apache.org/
https://www.cve.org/CVERecord?id=CVE-2024-27316
Timeline:
2024-02-22: Reported to security team
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