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F5 Networks BIG-IP : Appliance mode tmsh access vulnerability (K02043709)

medium Nessus Plugin ID 118616

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Synopsis

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

Description

On a BIG-IP system configured in Appliance mode, the TMOS Shell (tmsh) may allow an administrative user to use the dig utility to gain unauthorized access to file system resources. (CVE-2018-5520)

Note : Appliance mode is designed to meet the needs of customers in especially sensitive sectors by limiting the BIG-IP system administrative access to match that of a typical network appliance and not a multi-user UNIX device. When a BIG-IP system is configured in Appliance mode, the Advanced Shell ( bash ) access to the file system is restricted. For information about Appliance mode, refer to K12815:
Overview of Appliance mode.

Impact

This vulnerability allows unauthorized disclosure of information.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K02043709.

See Also

https://my.f5.com/manage/s/article/K02043709

Plugin Details

Severity: Medium

ID: 118616

File Name: f5_bigip_SOL02043709.nasl

Version: 1.6

Type: local

Published: 11/2/2018

Updated: 11/2/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 3.5

Temporal Score: 2.6

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

CVSS Score Source: CVE-2018-5520

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

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

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

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_domain_name_system, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/h:f5:big-ip

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/30/2018

Vulnerability Publication Date: 5/2/2018

Reference Information

CVE: CVE-2018-5520