Debian dsa-5620 : libunbound-dev - security update

high Nessus Plugin ID 190510

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5620 advisory.

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- ------------------------------------------------------------------------- Debian Security Advisory DSA-5620-1 [email protected] https://www.debian.org/security/ Salvatore Bonaccorso February 14, 2024 https://www.debian.org/security/faq
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Package : unbound CVE ID : CVE-2023-50387 CVE-2023-50868 Debian Bug : 1063845

Two vulnerabilities were discovered in unbound, a validating, recursive, caching DNS resolver. Specially crafted DNSSEC answers could lead unbound down a very CPU intensive and time costly DNSSEC (CVE-2023-50387) or NSEC3 hash (CVE-2023-50868) validation path, resulting in denial of service.

Details can be found at https://nlnetlabs.nl/downloads/unbound/CVE-2023-50387_CVE-2023-50868.txt

For the oldstable distribution (bullseye), these problems have been fixed in version 1.13.1-1+deb11u2.

For the stable distribution (bookworm), these problems have been fixed in version 1.17.1-2+deb12u2.

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]
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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.

Plugin Details

Severity: High

ID: 190510

File Name: debian_DSA-5620.nasl

Version: 1.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 2/14/2024

Updated: 1/24/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2023-50387

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, 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:12.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 2/14/2024

Vulnerability Publication Date: 2/13/2024

Reference Information

CVE: CVE-2023-50387, CVE-2023-50868

Detections

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