CVE-2025-30187

Name	CVE-2025-30187
Description	In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1115643

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
dnsdist (PTS)	bullseye	1.5.1-3	fixed
	bookworm	1.7.3-2	fixed
	trixie	1.9.10-1	vulnerable
	forky, sid	2.0.1-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
dnsdist	source	bullseye	(not affected)
dnsdist	source	bookworm	(not affected)
dnsdist	source	(unstable)	2.0.1-1	1115643

Notes

[bookworm] - dnsdist <not-affected> (Vulnerable code not present)
[bullseye] - dnsdist <not-affected> (Vulnerable code not present)
https://www.openwall.com/lists/oss-security/2025/09/18/1
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-05.html