Detections
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RHEL 7 : dhcp (RHSA-2021:2357)
high Nessus Plugin ID 150432
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Synopsis
The remote Red Hat host is missing a security update for dhcp.Description
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:2357 advisory.The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network.
Security Fix(es):
* dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient (CVE-2021-25217)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL dhcp package based on the guidance in RHSA-2021:2357.See Also
http://www.nessus.org/u?09b75341
https://access.redhat.com/security/updates/classification/#important
Plugin Details
Severity: High
ID: 150432
File Name: redhat-RHSA-2021-2357.nasl
Version: 1.12
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 6/10/2021
Updated: 11/7/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.2
Vendor
Vendor Severity: Important
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
CPE: p-cpe:/a:redhat:enterprise_linux:dhcp-common, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:dhcp-libs, p-cpe:/a:redhat:enterprise_linux:dhcp-devel, p-cpe:/a:redhat:enterprise_linux:dhcp, p-cpe:/a:redhat:enterprise_linux:dhclient
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 6/9/2021
Vulnerability Publication Date: 5/26/2021
Reference Information
CVE: CVE-2021-25217