Vulnerabilities > CVE-2019-6681 - Missing Release of Resource after Effective Lifetime vulnerability in F5 Big-Ip Local Traffic Manager
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
COMPLETE Summary
On BIG-IP versions 15.0.0-15.0.1.1, 14.1.0-14.1.2, 14.0.0-14.0.1, 13.1.0-13.1.3.1, and 12.1.0-12.1.5, a memory leak in Multicast Forwarding Cache (MFC) handling in tmrouted.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- HTTP DoS An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.
Nessus
NASL family | F5 Networks Local Security Checks |
NASL id | F5_BIGIP_SOL93417064.NASL |
description | Memory leak in Multicast Forwarding Cache (MFC) handling in tmrouted. (CVE-2019-6681) Impact A BIG-IP system licensed with the ZebOS dynamic routing and multicast routing bundle, configured with (static or dynamic) multicast routes that use the Multicast Forwarding Cache (MFC), may experience a memory leak in the tmrouted process, exhaust system resources, restart, and cause a disruption of service. MFC is used for forwarding packets matching multicast routes and is used by static and dynamic multicast routing protocols. Note : ZebOS dynamic routing and multicast routing bundle licenses are required. Vulnerable configurations consist of static multicast routes or dynamic multicast routing protocols configured, such as Protocol Independent Multicasting (PIM). For more information about PIM multicast routing configurations, refer to the BIG-IP Advanced Routing Multicast Configuration Guide . For information about multicast static route creation, refer to the ip mroute command section in the BIG-IPAdvanced Routing Network Services Manager Command Line Interface Reference Guide . Note : For information about how to locate F5 product manuals, refer to K98133564: Tips for searching AskF5 and finding product documentation. |
last seen | 2020-03-17 |
modified | 2019-12-31 |
plugin id | 132580 |
published | 2019-12-31 |
reporter | This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
source | https://www.tenable.com/plugins/nessus/132580 |
title | F5 Networks BIG-IP : MFC vulnerability (K93417064) |
code |
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