F5 Networks BIG-IP : Python vulnerability (K57542514)

critical Nessus Plugin ID 151496

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Synopsis

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

Description

Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by:
Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname).
The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. (CVE-2019-9636)

Impact

A remote attacker may be able to use a specially crafted URL to locate cookies or authentication data and send that information to a different host than when parsed correctly.

BIG-IP Extended Application Verification (EAV) monitors using the Python urlsplit() function with URLs from an untrusted source may be impacted by this vulnerability.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K57542514.

See Also

https://support.f5.com/csp/article/K57542514

Plugin Details

Severity: Critical

ID: 151496

File Name: f5_bigip_SOL57542514.nasl

Version: 1.2

Type: local

Published: 7/12/2021

Updated: 7/14/2021

Dependencies: f5_bigip_detect.nbin

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: 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: 9/16/2020

Vulnerability Publication Date: 3/8/2019

Reference Information

CVE: CVE-2019-9636