Acceptance of Extraneous Untrusted Data With Trusted Data Affecting unbound-debuginfo package, versions <0:1.7.3-15.amzn2.0.11


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.07% (23rd percentile)

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  • Snyk IDSNYK-AMZN2-UNBOUNDDEBUGINFO-13846728
  • published6 Nov 2025
  • disclosed22 Oct 2025

Introduced: 22 Oct 2025

CVE-2025-11411  (opens in a new tab)
CWE-349  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 unbound-debuginfo to version 0:1.7.3-15.amzn2.0.11 or higher.
This issue was patched in ALAS2-2025-3055.

NVD Description

Note: Versions mentioned in the description apply only to the upstream unbound-debuginfo package and not the unbound-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

NLnet Labs Unbound up to and including version 1.24.1 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that complement positive DNS replies in the authority section can be used to trick resolvers to update their delegation information for the zone. Usually these RRSets are used to update the resolver's knowledge of the zone's name servers. A malicious actor can exploit the possible poisonous effect by injecting NS RRSets (and possibly their respective address records) in a reply. This could be done for example by trying to spoof a packet or fragmentation attacks. Unbound would then proceed to update the NS RRSet data it already has since the new data has enough trust for it, i.e., in-zone data for the delegation point. Unbound 1.24.1 includes a fix that scrubs unsolicited NS RRSets (and their respective address records) from replies mitigating the possible poison effect. Unbound 1.24.2 includes an additional fix that scrubs unsolicited NS RRSets (and their respective address records) from YXDOMAIN and non-referral nodata replies, further mitigating the possible poison effect.

CVSS Base Scores

version 3.1