CVE-2024-25581

2024-05-1415:05:29

CWE-20

web.nvd.nist.gov

cve-2024-25581

dnsdist

nghttp2

dns over https

denial of service

axfr

ixfr

tcp

dns over tls

do53

CVSS3

7.5

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

AI Score

6.6

Confidence

Low

EPSS

Percentile

9.0%

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.

CNA Affected

[
  {
    "collectionURL": "https://repo.powerdns.com/",
    "defaultStatus": "unaffected",
    "modules": [
      "dns-over-https"
    ],
    "packageName": "dnsdist",
    "product": "DNSdist",
    "repo": "https://github.com/PowerDNS/pdns",
    "vendor": "PowerDNS",
    "versions": [
      {
        "status": "affected",
        "version": "1.9.0"
      },
      {
        "status": "affected",
        "version": "1.9.1"
      },
      {
        "status": "affected",
        "version": "1.9.2"
      },
      {
        "status": "affected",
        "version": "1.9.3"
      }
    ]
  }
]