CVE-2024-45403

h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. When h2o is configured as a reverse proxy and HTTP/3 requests are cancelled by the client, h2o might crash due to an assertion failure. The crash can be exploited by an attacker to mount a Denial-of-Service attack. By default, the h2o standalone server automatically restarts, minimizing the impact. However, HTTP requests that were served concurrently will still be disrupted. The vulnerability has been addressed in commit 1ed32b2. Users may disable the use of HTTP/3 to mitigate the issue.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562
https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c
https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92
https://h2o.examp1e.net/configure/http3_directives.html

Configurations

No configuration.

History

15 Oct 2024, 12:58

Type	Values Removed	Values Added
Summary		(es) h2o es un servidor HTTP compatible con HTTP/1.x, HTTP/2 y HTTP/3. Cuando h2o está configurado como un proxy inverso y el cliente cancela las solicitudes HTTP/3, h2o puede bloquearse debido a un error de aserción. Un atacante puede aprovechar el bloqueo para lanzar un ataque de denegación de servicio. De forma predeterminada, el servidor independiente h2o se reinicia automáticamente, lo que minimiza el impacto. Sin embargo, las solicitudes HTTP que se atendieron simultáneamente seguirán siendo interrumpidas. La vulnerabilidad se ha solucionado en el commit 1ed32b2. Los usuarios pueden desactivar el uso de HTTP/3 para mitigar el problema.

11 Oct 2024, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-10-11 15:15

Updated : 2024-10-15 12:58

NVD link : CVE-2024-45403

Mitre link : CVE-2024-45403

CVE.ORG link : CVE-2024-45403

JSON object : View

Products Affected

No product.

CWE

CWE-617

Reachable Assertion

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