Detections
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Unity Linux 20.1070e Security Update: unbound (UTSA-2026-007095)
high Nessus Plugin ID 305931
Synopsis
The Unity Linux host is missing one or more security updates.Description
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007095 advisory.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.
Tenable has extracted the preceding description block directly from the Unity Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected unbound package.See Also
http://www.nessus.org/u?24408599
Plugin Details
Severity: High
ID: 305931
File Name: unity_linux_UTSA-2026-007095.nasl
Version: 1.1
Type: Local
Published: 4/10/2026
Updated: 4/10/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.1
CVSS v2
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 3.9
Vector: CVSS2#AV:A/AC:H/Au:N/C:N/I:C/A:P
CVSS Score Source: CVE-2025-11411
CVSS v3
Risk Factor: Medium
Base Score: 6.9
Temporal Score: 6
Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 7.1
Threat Score: 4.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/UOS-Server/release, Host/UOS-Server/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 4/10/2026
Vulnerability Publication Date: 10/22/2025
Reference Information
CVE: CVE-2025-11411