CVE-2024-27316

Apache HTTP Server: HTTP/2 DoS by memory exhaustion on endless continuation frames

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

Los encabezados entrantes HTTP/2 que exceden el límite se almacenan temporalmente en nghttp2 para generar una respuesta HTTP 413 informativa. Si un cliente no deja de enviar encabezados, esto provoca que se agote la memoria.

A vulnerability was found in how Apache httpd implements the HTTP/2 protocol. There are insufficient limitations placed on the amount of CONTINUATION frames that can be sent within a single stream. This issue could allow an unauthenticated remote attacker to send packets to vulnerable servers, which could use up memory resources to cause a Denial of Service.

*Credits: Bartek Nowotarski (https://nowotarski.info/)

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-23 CVE Reserved
2024-04-04 CVE Published
2024-04-13 First Exploit
2024-07-30 EPSS Updated
2024-08-02 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-400: Uncontrolled Resource Consumption
CWE-770: Allocation of Resources Without Limits or Throttling

CAPEC

References (9)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2024/04/04/4	Mailing List
https://www.openwall.com/lists/oss-security/2024/04/03/16
https://support.apple.com/kb/HT214119
http://seclists.org/fulldisclosure/2024/Jul/18

URL	Date	SRC
https://github.com/lockness-Ko/CVE-2024-27316	2024-04-13
https://github.com/aeyesec/CVE-2024-27316_poc	2024-04-17

URL	Date	SRC

URL	Date	SRC
https://httpd.apache.org/security/vulnerabilities_24.html	2024-07-22
https://access.redhat.com/security/cve/CVE-2024-27316	2024-08-08
https://bugzilla.redhat.com/show_bug.cgi?id=2268277	2024-08-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apache Search vendor "Apache"		Http Server Search vendor "Apache" for product "Http Server"				>= 2.4.17 < 2.4.59 Search vendor "Apache" for product "Http Server" and version " >= 2.4.17 < 2.4.59"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				40 Search vendor "Fedoraproject" for product "Fedora" and version "40"		-		Affected
Netapp Search vendor "Netapp"		Ontap Search vendor "Netapp" for product "Ontap"				9 Search vendor "Netapp" for product "Ontap" and version "9"		-		Affected