Denial of service in curl implementation in F5 Traffix SDC

Published: 2021-02-19 | Updated: 2023-10-28
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2020-8285
Exploitation vector Network
Public exploit N/A
Vulnerable software
Traffix SDC
Client/Desktop applications / Software for system administration

Vendor F5 Networks

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Uncontrolled Recursion

EUVDB-ID: #VU48894

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8285

CWE-ID: CWE-674 - Uncontrolled Recursion

Exploit availability: No


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due tu uncontrolled recursion when processing FTP responses within the wildcard matching functionality, which allows a callback (set with <a href="">CURLOPT_CHUNK_BGN_FUNCTION</a>) to return information back to libcurl on how to handle a specific entry in a directory when libcurl iterates over a list of all available entries. A remote attacker who controls the malicious FTP server can trick the victim to connect to it and crash the application, which is using the affected libcurl version.


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

Vulnerable software versions

Traffix SDC: 5.0.0 - 5.1.0 CF 22

External links

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.