CVE-2024-45403
H2O HTTP Server HTTP/3 Denial-of-Service Crash Vulnerability
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.
INFO
Published Date :
Oct. 11, 2024, 3:15 p.m.
Last Modified :
Oct. 15, 2024, 12:58 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-45403.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2024-45403 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-45403 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Received by [email protected]
Oct. 11, 2024
Action Type Old Value New Value Added 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. Added Reference GitHub, Inc. https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92 [No types assigned] Added Reference GitHub, Inc. https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562 [No types assigned] Added Reference GitHub, Inc. https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c [No types assigned] Added Reference GitHub, Inc. https://h2o.examp1e.net/configure/http3_directives.html [No types assigned] Added CWE GitHub, Inc. CWE-617 Added CVSS V3.1 GitHub, Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-45403 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-45403
weaknesses.