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F5 Networks BIG-IP : zxfrd vulnerability (K25595031)

medium Nessus Plugin ID 144344

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

zxfrd leaks memory when listing DNS zones. Zones can be listed via TMSH, iControl or SNMP; only users with access to those services can trigger this vulnerability.(CVE-2020-27725)

Impact

The memory leak by the zxfrd processeventually causesthe system to experiencean out-of-memory condition. As a result, systems in a high availability (HA) configurationmayexperience a failover. This vulnerability affects only BIG-IP systems that are provisioned with BIG-IP DNS or BIG-IP GTM andat least one DNS zone.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K25595031.

See Also

https://my.f5.com/manage/s/article/K25595031

Plugin Details

Severity: Medium

ID: 144344

File Name: f5_bigip_SOL25595031.nasl

Version: 1.8

Type: local

Published: 12/17/2020

Updated: 11/3/2023

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Low

Base Score: 3.5

Temporal Score: 2.6

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

CVSS Score Source: CVE-2020-27725

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

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

Vulnerability Information

CPE: cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_domain_name_system, cpe:/h:f5:big-ip, cpe:/a:f5:big-ip_global_traffic_manager

Required KB Items: Host/local_checks_enabled, Settings/ParanoidReport, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version

Exploit Ease: No known exploits are available

Patch Publication Date: 12/16/2020

Vulnerability Publication Date: 12/24/2020

Reference Information

CVE: CVE-2020-27725

IAVA: 2021-A-0004-S