An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

dnsdist-2.0.3-1.1 on GA media

Security update for dnsdist

Affected: Ubuntu:16.04:LTS: dnsdist, Ubuntu:Pro:18.04:LTS: dnsdist, Ubuntu:Pro:20.04:LTS: dnsdist, Ubuntu:Pro:22.04:LTS: dnsdist, Ubuntu:Pro:24.04:LTS: dnsdist, Ubuntu:25.10: dnsdist, Ubuntu:26.04:LTS: dnsdist

An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.

Ein Angreifer kann mehrere Schwachstellen in PowerDNS ausnutzen, um Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen, um einen Denial of Service zu verursachen und potentiell Code auszuführen.