Google: net-misc/dhcp: security update to 17033.0.0

high Tenable Cloud Security Plugin ID 452045

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- In ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16, ISC DHCP 4.4.0 -> 4.4.2 (Other branches of ISC DHCP (i.e., releases
in the 4.0.x series or lower and releases in the 4.3.x series) are beyond their End-of-Life (EOL) and no
longer supported by ISC. From inspection it is clear that the defect is also present in releases from
those series, but they have not been officially tested for the vulnerability), The outcome of encountering
the defect while reading a lease that will trigger it varies, according to: the component being affected
(i.e., dhclient or dhcpd) whether the package was built as a 32-bit or 64-bit binary whether the compiler
flag -fstack-protection-strong was used when compiling In dhclient, ISC has not successfully reproduced
the error on a 64-bit system. However, on a 32-bit system it is possible to cause dhclient to crash when
reading an improper lease, which could cause network connectivity problems for an affected system due to
the absence of a running DHCP client process. In dhcpd, when run in DHCPv4 or DHCPv6 mode: if the dhcpd
server binary was built for a 32-bit architecture AND the -fstack-protection-strong flag was specified to
the compiler, dhcpd may exit while parsing a lease file containing an objectionable lease, resulting in
lack of service to clients. Additionally, the offending lease and the lease immediately following it in
the lease database may be improperly deleted. if the dhcpd server binary was built for a 64-bit
architecture OR if the -fstack-protection-strong compiler flag was NOT specified, the crash will not
occur, but it is possible for the offending lease and the lease which immediately followed it to be
improperly deleted. (CVE-2021-25217)

Solution

Update the net-misc/dhcp library and its related packages to version 17033.0.0 or later.

Plugin Details

Severity: High

ID: 452045

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Medium

Score: 5.3

Percentile: 96.77

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.6

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

CVSS Score Source: CVE-2021-25217

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.7

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 5/26/2021

Reference Information

CVE: CVE-2021-25217

Detections

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