Reachable Assertion The advisory has been revoked - it doesn't affect any version of package h2o (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN11-H2O-8182990
- published12 Oct 2024
- disclosed11 Oct 2024
Introduced: 11 Oct 2024
CVE-2024-45403 (opens in a new tab)Amendment
The Debian security team deemed this advisory irrelevant for Debian:11.
NVD Description
Note: Versions mentioned in the description apply only to the upstream h2o package and not the h2o package as distributed by Debian.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2024-45403
- 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