CVE search · CVE-2024-45403
CVE-2024-45403
high 7.5
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.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- security-advisories@github.com
- Weakness
- CWE-617
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | low 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
security-advisories@github.comSecondary |
| CVSS 3.1 | high 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- dena · h2o
References
- https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562Patch
- https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354cPatch
- https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92Vendor Advisory
- https://h2o.examp1e.net/configure/http3_directives.htmlProduct