F5 Networks BIG-IP : TMM vulnerability (K64208870)

High Nessus Plugin ID 118689

Synopsis

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

Description

Malicious requests made to virtual servers with an HTTP profile can cause the TMM to restart. The issue is exposed with the non-default 'normalize URI' configuration options used in iRules and/or BIG-IP LTM policies. (CVE-2018-15319)

Impact

An attacker may be able to disrupt traffic or cause the BIG-IP system to fail over to another device in the device group. This vulnerability affects systems with any of the following configurations :

A virtual server associated with an HTTP profile and a local traffic policy that has a rule condition with the HTTP URI and Use normalized URI options enabled (the Use normalized URI option is disabled by default).

For example, in the following configuration excerpt, the local traffic policy is vulnerable :

ltm policy /Common/K64208870 {

requires { http } rules { vulnerable { conditions { 0 { http-uri path normalized values { /exploitable } } } } } strategy /Common/first-match }

A virtual server associated with an HTTP profile and an iRule using any of the following iRules commands with the -normalized switch:
HTTP::uri

HTTP::query

HTTP::path

For example :

when HTTP_REQUEST { if { ([HTTP::uri -normalized] starts_with '/exploitable')} { log local0.error 'K64208870 URI example' } elseif { ([HTTP::query -normalized] starts_with '/exploitable')} { log local0.error 'K64208870 Query example' } elseif { ([HTTP::path

-normalized] starts_with '/exploitable')} { log local0.error 'K64208870 Path example' } }

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K64208870.

See Also

https://support.f5.com/csp/#/article/K64208870

Plugin Details

Severity: High

ID: 118689

File Name: f5_bigip_SOL64208870.nasl

Version: 1.1

Type: local

Published: 2018/11/02

Modified: 2018/11/02

Dependencies: 76940

Risk Information

Risk Factor: High

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_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, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version, Settings/ParanoidReport

Patch Publication Date: 2018/10/30

Reference Information

CVE: CVE-2018-15319