CVE-2024-25581 — Improper Input Validation in Dnsdist

CWE-20 — Improper Input Validation5 documents5 sources

Severity

7.5HIGHNVD

EPSS

0.0%

top 97.43%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Powerdns Dnsdist

Timeline

PublishedMay 14

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶Debianpowerdns/dnsdist< 1.9.4-1+1

▶CVEListV5powerdns/dnsdist4 versions+3

🔴Vulnerability Details

OSV

CVE-2024-25581: 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↗2024-05-14

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GHSA

GHSA-55g9-rgmx-hvww: 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↗2024-05-14

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CVEList

Transfer requests received over DoH can lead to a denial of service in DNSdist↗2024-05-13

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📋Vendor Advisories

Debian

CVE-2024-25581: dnsdist - When incoming DNS over HTTPS support is enabled using the nghttp2 provider, and ...↗2024

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