F5 Networks BIG-IP : BIND vulnerability (K15840535)

Medium Nessus Plugin ID 133625

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VPR Score: 3.6

Synopsis

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

Description

With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem). (CVE-2019-6477)

Impact

An attacker may be able to use TCP-pipelined queries to increase the load on the system, causing it to become unresponsive.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K15840535.

See Also

https://support.f5.com/csp/article/K15840535

Plugin Details

Severity: Medium

ID: 133625

File Name: f5_bigip_SOL15840535.nasl

Version: 1.5

Type: local

Published: 2020/02/12

Updated: 2020/07/09

Dependencies: 76940

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2019/12/02

Vulnerability Publication Date: 2019/11/26

Reference Information

CVE: CVE-2019-6477