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CVE-2025-30187

CVE-2025-30187 · Denial of service via crafted DoH exchange in PowerDNS DNSdist

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 3.7 · Low · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • dnsdist

    Versions
    • ≥ 1.9.0, < 1.9.11: Affected (semver)
    • ≥ 2.0.0, < 2.0.1: Affected (semver)

    Update to 1.9.11; Update to 2.0.1

  • dnsdist Debian:13

    Versions
    • 1.9.10-1
    Affected ranges
    • ECOSYSTEM: < 1.9.10-1+deb13u1

    Update to 1.9.10-1+deb13u1

  • dnsdist Debian:14

    Versions
    • 1.9.10-1
    • 2.0.0-1
    • 2.0.0-2
    • 2.0.0-3
    • 2.0.0-4
    • 2.0.0-5
    • 2.0.0-6
    • 2.0.0~rc1-1
    • 2.0.0~rc1-2
    • 2.0.0~rc2-1
    Affected ranges
    • ECOSYSTEM: < 2.0.1-1

    Update to 2.0.1-1

  • dnsdist Ubuntu:25.10

    Versions
    • 1.9.8-1
    • 1.9.10-1
    Affected ranges
    • ECOSYSTEM: < 1.9.10-1ubuntu0.1

    Update to 1.9.10-1ubuntu0.1

Original sources

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