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F5 Networks BIG-IP : TMM vulnerability (K43450419)

high Nessus Plugin ID 136137

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Synopsis

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

Description

Undisclosed requests can lead to a denial of service (DoS) when sent to BIG-IP HTTP/2 virtual servers. The problem can occur when ciphers, which have been blacklisted by the HTTP/2 RFC, are used on backend servers. This is a data-plane issue. There is no control-plane exposure. (CVE-2020-5871)

Impact

This vulnerability affects only the virtual server associated with the HTTP/2 profile that has the HTTP MRF Router setting selected. The BIG-IP system may temporarily fail to process traffic as it recovers from a Traffic Management Microkernel (TMM) restart. If the BIG-IP system is configured for high availability (HA), it fails over to a peer system.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K43450419.

See Also

https://my.f5.com/manage/s/article/K43450419

Plugin Details

Severity: High

ID: 136137

File Name: f5_bigip_SOL43450419.nasl

Version: 1.8

Type: local

Published: 4/30/2020

Updated: 11/2/2023

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-5871

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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:/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: 4/29/2020

Vulnerability Publication Date: 4/30/2020

Reference Information

CVE: CVE-2020-5871

IAVA: 2021-A-0108-S