Slackware Linux 15.0 / current dnsmasq Multiple Vulnerabilities (SSA:2024-044-02)

high Nessus Plugin ID 190522


The remote Slackware Linux host is missing a security update to dnsmasq.


The version of dnsmasq installed on the remote host is prior to 2.90. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2024-044-02 advisory.

- MITRE: CVE-2023-50387 DNSSEC verification complexity can be exploited to exhaust CPU resources and stall DNS resolvers (CVE-2023-50387)

- The processing of responses coming from DNSSEC-signed zones using NSEC3 can cause CPU exhaustion on a DNSSEC-validating resolver.By flooding the target resolver with queries exploiting this flaw an attacker can significantly impair the resolver's performance, effectively denying legitimate clients access to the DNS resolution service. (CVE-2023-50868)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade the affected dnsmasq package.

See Also

Plugin Details

Severity: High

ID: 190522

File Name: Slackware_SSA_2024-044-02.nasl

Version: 1.1

Type: local

Published: 2/14/2024

Updated: 2/21/2024

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 5.1


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


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: p-cpe:/a:slackware:slackware_linux:dnsmasq, cpe:/o:slackware:slackware_linux, cpe:/o:slackware:slackware_linux:15.0

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Ease: No known exploits are available

Patch Publication Date: 2/13/2024

Vulnerability Publication Date: 2/13/2024

Reference Information

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