CVE-2023-30847

Name	CVE-2023-30847
Description	H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.
Source	CVE (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 Package	Release	Version	Status
h2o (PTS)	buster	2.2.5+dfsg2-2+deb10u1	fixed
	buster (security)	2.2.5+dfsg2-2+deb10u2	fixed
	bullseye	2.2.5+dfsg2-6	fixed
	bookworm	2.2.5+dfsg2-7	fixed
	trixie	2.2.5+dfsg2-8	fixed
	sid	2.2.5+dfsg2-8.1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
h2o	source	(unstable)	(not affected)

Notes

- h2o <not-affected> (Vulnerable code not present before 2.2.6 upstream)
Fixed by: https://github.com/h2o/h2o/commit/a70af675328dda438ecd9d8a1673c1715fd93cc7
Fixed by: https://github.com/h2o/h2o/commit/5f57d505514e937d13787b1f408837cb9197e2b2
https://github.com/h2o/h2o/pull/3229
https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx