F5 Networks BIG-IP : BIG-IP APM redirect vulnerability (K66171422)

Medium Nessus Plugin ID 118693

Synopsis

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

Description

Aninsecure AES ECB mode is usedfor orig_uri parameter in an undisclosed /vdesk link of APM virtual server configured with an access profile, allowing a malicious user to build a redirect URI value using different blocks of cipher texts. (CVE-2018-5548)

Impact

An attacker can forge a URL with an obfuscated (encrypted and encoded) value in an orig_uri parameter. An authenticated user with an established access session to the BIG-IP APM system may be redirected to a malicious website following the forged URL.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K66171422.

See Also

https://support.f5.com/csp/#/article/K66171422

Plugin Details

Severity: Medium

ID: 118693

File Name: f5_bigip_SOL66171422.nasl

Version: 1.2

Type: local

Published: 2018/11/02

Modified: 2018/12/04

Dependencies: 76940

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5.8

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

CVSS v3.0

Base Score: 6.1

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

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_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

Patch Publication Date: 2018/09/07

Reference Information

CVE: CVE-2018-5548