Information disclosure in curl implementation within Command Line Interface, EAV Monitors and iRules components in F5 BIG-IP products

Published: 2021-02-19

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU48893

Risk: Medium


CVE-ID: CVE-2020-8284

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the way cURL handles PASV responses. A remote attacker with control over malicious FTP server can use the PASV response to trick curl into connecting back to a given IP address and port, and this way potentially make curl extract information about services that are otherwise private and not disclosed, for example doing port scanning and service banner extractions.


Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BIG-IP SSLO: 14.1.0 -

BIG-IP PEM: 14.1.0 -

BIG-IP Link Controller: 14.1.0 -

BIG-IP GTM: 14.1.0 -

BIG-IP FPS: 14.1.0 -

BIG-IP DNS: 14.1.0 -

BIG-IP DDHD: 14.1.0 -

BIG-IP ASM: 14.1.0 -

BIG-IP APM: 14.1.0 -

BIG-IP Analytics: 14.1.0 -

BIG-IP AFM: 14.1.0 -

BIG-IP Advanced WAF: 14.1.0 -

BIG-IP AAM: 14.1.0 -

BIG-IP LTM: 14.1.0 -

BIG-IP: 14.1.0 -

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?