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Debian dsa-6304 : libunbound-dev - security update
critical Nessus Plugin ID 317343
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Synopsis
The remote Debian host is missing one or more security-related updates.Description
The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6304 advisory.- ------------------------------------------------------------------------- Debian Security Advisory DSA-6304-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff May 27, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------
Package : unbound CVE ID : CVE-2026-33278 CVE-2026-42944 CVE-2026-42959 CVE-2026-32792 CVE-2026-40622 CVE-2026-41292 CVE-2026-42534 CVE-2026-42923 CVE-2026-42960 CVE-2026-44390 CVE-2026-44608
Multiple security vulnerabilities were discovered in Unbound, a validating, recursive, caching DNS resolver, which could result in denial of service, cache poisoning or potentially the execution of arbitrary code.
For the stable distribution (trixie), this problem has been fixed in version 1.22.0-2+deb13u3.
We recommend that you upgrade your unbound packages.
For the detailed security status of unbound please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/unbound
Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/
Mailing list: [email protected]
Tenable has extracted the preceding description block directly from the Debian security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade the libunbound-dev packages.See Also
https://security-tracker.debian.org/tracker/source-package/unbound
https://security-tracker.debian.org/tracker/CVE-2026-32792
https://security-tracker.debian.org/tracker/CVE-2026-33278
https://security-tracker.debian.org/tracker/CVE-2026-40622
https://security-tracker.debian.org/tracker/CVE-2026-41292
https://security-tracker.debian.org/tracker/CVE-2026-42534
https://security-tracker.debian.org/tracker/CVE-2026-42923
https://security-tracker.debian.org/tracker/CVE-2026-42944
https://security-tracker.debian.org/tracker/CVE-2026-42959
https://security-tracker.debian.org/tracker/CVE-2026-42960
https://security-tracker.debian.org/tracker/CVE-2026-44390
Plugin Details
Severity: Critical
ID: 317343
File Name: debian_DSA-6304.nasl
Version: 1.1
Type: Local
Agent: unix
Family: Debian Local Security Checks
Published: 5/28/2026
Updated: 5/28/2026
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-33278
CVSS v3
Risk Factor: Critical
Base Score: 10
Temporal Score: 8.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2026-42960
CVSS v4
Risk Factor: Critical
Base Score: 10
Threat Score: 9.1
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:python3-unbound, p-cpe:/a:debian:debian_linux:unbound-anchor, p-cpe:/a:debian:debian_linux:unbound, p-cpe:/a:debian:debian_linux:libunbound8, p-cpe:/a:debian:debian_linux:libunbound-dev, p-cpe:/a:debian:debian_linux:unbound-host, cpe:/o:debian:debian_linux:13.0
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Ease: No known exploits are available
Patch Publication Date: 5/27/2026
Vulnerability Publication Date: 5/20/2026
Reference Information
CVE: CVE-2026-32792, CVE-2026-33278, CVE-2026-40622, CVE-2026-41292, CVE-2026-42534, CVE-2026-42923, CVE-2026-42944, CVE-2026-42959, CVE-2026-42960, CVE-2026-44390, CVE-2026-44608