F5 Networks BIG-IP : BIG-IP SSL/TLS CRL vulnerability (K72752002)

high Nessus Plugin ID 139828

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Synopsis

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

Description

The BIG-IP Client or Server SSL profile ignores revoked certificates, even when a valid CRL is present. This impacts SSL/TLS connections and may result in a man-in-the-middle attack on the connections.(CVE-2020-5913)

Impact

The BIG-IP system does not enforce Transport Layer Security (TLS) certificate chain restrictions as expected. As a result, SSL/TLS connections are encrypted, but may be vulnerable to man-in-the-middle attacks. This vulnerability affects connections that use a BIG-IP Client SSL or Server SSL profile with Certificate Revocation List (CRL) validation enabled and revoked, but otherwise valid certificates.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K72752002.

Plugin Details

Severity: High

ID: 139828

File Name: f5_bigip_SOL72752002.nasl

Version: 1.9

Type: local

Family: F5 Networks Local Security Checks

Published: 8/26/2020

Updated: 11/3/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2020-5913

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: 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, cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager

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: 8/25/2020

Vulnerability Publication Date: 8/26/2020

Reference Information

CVE: CVE-2020-5913

IAVA: 2020-A-0395-S

Detections

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