Vulnerability CVE-2024-45403

Vulnerability CVE-2024-45403

Published: 2024-10-11

Description:

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.

Type:

CWE-617

(Reachable Assertion)

References:

https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92

https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562

https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c

https://h2o.examp1e.net/configure/http3_directives.html

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