#VU23773 Improper Certificate Validation in BIG-IP ASM - CVE-2019-6687

Vulnerability identifier: #VU23773

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-6687

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BIG-IP ASM
Hardware solutions / Security hardware applicances

Vendor: F5 Networks

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle attack.

The vulnerability exists due to the Cloud Security Services profile uses a built-in verification mechanism that fails to properly authenticate the X.509 certificate of remote endpoints. A remote attacker can perform a man-in-the-middle attack, intercept traffic destined for cloud services and read and modify data that is in transit.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP ASM: 15.0.1

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External links
https://support.f5.com/csp/article/K59957337

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.