CVE-2024-25581

Name	CVE-2024-25581
Description	When incoming DNS over HTTPS support is enabled using the nghttp2 provider, and queries are routed to a tcp-only or DNS over TLS backend, an attacker can trigger an assertion failure in DNSdist by sending a request for a zone transfer (AXFR or IXFR) over DNS over HTTPS, causing the process to stop and thus leading to a Denial of Service. DNS over HTTPS is not enabled by default, and backends are using plain DNS (Do53) by default.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1071750

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
	sid, trixie	1.9.6-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
dnsdist	source	buster	(not affected)
dnsdist	source	bullseye	(not affected)
dnsdist	source	bookworm	(not affected)
dnsdist	source	(unstable)	1.9.4-1	1071750

Notes

[bookworm] - dnsdist <not-affected> (Vulnerable code not present)
[bullseye] - dnsdist <not-affected> (Vulnerable code not present)
[buster] - dnsdist <not-affected> (Vulnerable code not present)
https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2024-03.html
Patches: https://downloads.powerdns.com/patches/2024-03/