Debian DSA-5251-1 : isc-dhcp - security update

medium Nessus Plugin ID 165757

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Synopsis

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

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5251 advisory.

Several vulnerabilities have been discovered in the ISC DHCP client, relay and server. CVE-2022-2928 It was discovered that the DHCP server does not correctly perform option reference counting when configured with allow leasequery;. A remote attacker can take advantage of this flaw to cause a denial of service (daemon crash). CVE-2022-2929 It was discovered that the DHCP server is prone to a memory leak flaw when handling contents of option 81 (fqdn) data received in a DHCP packet. A remote attacker can take advantage of this flaw to cause DHCP servers to consume resources, resulting in denial of service. For the stable distribution (bullseye), these problems have been fixed in version 4.4.1-2.3+deb11u1. We recommend that you upgrade your isc-dhcp packages. For the detailed security status of isc-dhcp please refer to its security tracker page at: https://security-tracker.debian.org/tracker/isc-dhcp

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 isc-dhcp packages.

For the stable distribution (bullseye), these problems have been fixed in version 4.4.1-2.3+deb11u1.

Plugin Details

Severity: Medium

ID: 165757

File Name: debian_DSA-5251.nasl

Version: 1.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/7/2022

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2022-2929

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:A/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:isc-dhcp-common, p-cpe:/a:debian:debian_linux:isc-dhcp-client, p-cpe:/a:debian:debian_linux:isc-dhcp-dev, p-cpe:/a:debian:debian_linux:isc-dhcp-server-ldap, p-cpe:/a:debian:debian_linux:isc-dhcp-client-udeb, p-cpe:/a:debian:debian_linux:isc-dhcp-relay, p-cpe:/a:debian:debian_linux:isc-dhcp-client-ddns, p-cpe:/a:debian:debian_linux:isc-dhcp-server

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/6/2022

Vulnerability Publication Date: 10/6/2022

Reference Information

CVE: CVE-2022-2928, CVE-2022-2929

IAVB: 2022-B-0037

Detections

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