PT-2025-43065 · Nlnet · Unbound

Baojun Liu + 3 · Published 2025-10-22 · Updated 2025-10-24 · CVE-2025-11411

Positive Technologies · (AI Summary)

CVSS v4.0

7.1

7.1

High

Base vector

AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions up to and including 1.24.0

Description Unbound is susceptible to domain hijack attacks through the manipulation of DNS responses. Specifically, maliciously crafted NS Resource Record Sets (RRSets) included in replies can cause the resolver to update its delegation information, potentially leading to a zone transfer. An attacker could exploit this by injecting NS RRSets, possibly through packet spoofing or fragmentation attacks, causing Unbound to update its existing NS RRSet data due to the perceived trustworthiness of the injected information.

Recommendations Update to version 1.24.1 or later.

Fix

Weakness Enumeration

CWE-349

Related Identifiers

ALT-PU-2025-13416

CVE-2025-11411

Affected Products

Unbound

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2025-11411 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-11411 · Security Note
• https://errata.altlinux.org/ALT-PU-2025-13416 · Vendor Advisory
• https://nlnetlabs.nl/downloads/unbound/CVE-2025-11411.txt · Vendor Advisory
• https://t.me/msrcreports/2224 · Telegram Post
• https://packages.altlinux.org/ru/vuln/CVE-2025-11411 · Note
• https://twitter.com/beyondDNS/status/1981176983653667287 · Twitter Post
• https://t.me/CVEtracker/35484 · Telegram Post
• https://reddit.com/r/PFSENSE/comments/1oef6o8/unbound_cve202511411 · Reddit Post
• https://t.me/cveNotify/139833 · Telegram Post