CVE-2024-25581

2024-05-1415:05:29

Debian Security Bug Tracker

security-tracker.debian.org

cve-2024-25581

dns over https

nghttp2 provider

zone transfer

assertion failure

denial of service

dnsdist

tcp-only

dns over tls

plain dns

unix

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

7.2 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

9.1%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Debian12alldnsdist< 1.7.3-2dnsdist_1.7.3-2_all.deb
Debian11alldnsdist< 1.5.1-3dnsdist_1.5.1-3_all.deb
Debian10alldnsdist< 1.3.3-3dnsdist_1.3.3-3_all.deb
Debian999alldnsdist< 1.9.4-1dnsdist_1.9.4-1_all.deb
Debian13alldnsdist< 1.9.4-1dnsdist_1.9.4-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	12	all	dnsdist	< 1.7.3-2	dnsdist_1.7.3-2_all.deb
Debian	11	all	dnsdist	< 1.5.1-3	dnsdist_1.5.1-3_all.deb
Debian	10	all	dnsdist	< 1.3.3-3	dnsdist_1.3.3-3_all.deb
Debian	999	all	dnsdist	< 1.9.4-1	dnsdist_1.9.4-1_all.deb
Debian	13	all	dnsdist	< 1.9.4-1	dnsdist_1.9.4-1_all.deb