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

medium Nessus Plugin ID 118693

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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://my.f5.com/manage/s/article/K66171422

Plugin Details

Severity: Medium

ID: 118693

File Name: f5_bigip_SOL66171422.nasl

Version: 1.7

Type: local

Published: 11/2/2018

Updated: 11/2/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

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

CVSS Score Source: CVE-2018-5548

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/7/2018

Vulnerability Publication Date: 9/13/2018

Reference Information

CVE: CVE-2018-5548