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F5 Networks BIG-IP : BIG-IP mcpd vulnerability (K87920510)

medium Nessus Plugin ID 127501

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Synopsis

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

Description

When processing authentication attempts for control-plane users, mcpd leaks a small amount of memory. Under rare conditions, attackers with access to the management interface can eventually deplete memory on the system. (CVE-2019-6647)

Impact

Repeated failed authentication attempts progressively increase memory usage, potentially leading to a fail-over event when memory is exhausted. The rate of memory use increase is small, but an attack at scale may trigger low-memory conditions eventually depleting memory and affecting the operation of the Traffic Management Microkernel (TMM) and other components.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K87920510.

See Also

https://my.f5.com/manage/s/article/K87920510

Plugin Details

Severity: Medium

ID: 127501

File Name: f5_bigip_SOL87920510.nasl

Version: 1.7

Type: local

Published: 8/12/2019

Updated: 11/3/2023

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2019-6647

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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_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_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/a:f5:big-ip_webaccelerator, cpe:/h:f5:big-ip

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: 8/8/2019

Vulnerability Publication Date: 9/4/2019

Reference Information

CVE: CVE-2019-6647