CVE-2024-45403

NameCVE-2024-45403
Descriptionh2o 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
h2o (PTS)bullseye2.2.5+dfsg2-6fixed
bookworm2.2.5+dfsg2-7fixed
sid, trixie2.2.5+dfsg2-9fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
h2osource(unstable)(not affected)

Notes

- h2o <not-affected> (Vulnerable code introduced later)
https://github.com/h2o/h2o/security/advisories/GHSA-4xp5-3jhc-3m92
Introduced by: https://github.com/h2o/h2o/commit/16b13eee8ad7895b4fe3fcbcabee53bd52782562
Fixed by: https://github.com/h2o/h2o/commit/1ed32b23f999acf0c5029f09c8525f93eb1d354c

Search for package or bug name: Reporting problems