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F5 Networks BIG-IP : CGNAT/PPTP vulnerability (K47527163)

high Nessus Plugin ID 124423

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Synopsis

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

Description

When processing certain rare data sequences occurring in PPTP VPN traffic, the BIG-IP system may execute incorrect logic. The TMM may restart and produce a core file as a result of this condition. The BIG-IP system provisioned with the CGNAT module and configured with a virtual server using a PPTP profile is exposed to this vulnerability.
(CVE-2019-6611)

Impact

The BIG-IP system temporarily fails to process traffic as it recovers from a Traffic Management Microkernel (TMM)restart, and devices configured in a device group may fail over.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K47527163.

See Also

https://my.f5.com/manage/s/article/K47527163

Plugin Details

Severity: High

ID: 124423

File Name: f5_bigip_SOL47527163.nasl

Version: 1.5

Type: local

Published: 5/1/2019

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-2019-6611

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:/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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/30/2019

Vulnerability Publication Date: 5/3/2019

Reference Information

CVE: CVE-2019-6611