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ISC DHCP < 4.4.3-P1 Multiple Vulnerabilities

medium Nessus Plugin ID 169908

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Synopsis

The DHCP server installed on the remote Linux host is affected by multiple vulnerabilities.

Description

The ISC DHCP server installed on the remote host is prior to 4.4.3-P1. It is, therefore, vulnerable to multiple vulnerabilities:

 - In ISC DHCP 4.4.0 up to 4.4.3, ISC DHCP 4.1-ESV-R1 up to 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort. (CVE-2022-2928)

 - In ISC DHCP 1.0 up to 4.4.3, ISC DHCP 4.1-ESV-R1 up to 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory. (CVE-2022-2929)

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

Solution

Upgrade the affected DHCP server to version 4.4.3-P1 or later.

Plugin Details

Severity: Medium

ID: 169908

File Name: isc_dhcp_4_4_3-P1.nasl

Version: 1.1

Type: local

Agent: unix

Family: Misc.

Published: 1/11/2023

Updated: 1/12/2023

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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:/a:isc:dhcp

Required KB Items: dhcp_server/type, dhcp_server/version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/5/2022

Vulnerability Publication Date: 10/5/2022

Reference Information

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

IAVB: 2022-B-0037