Vulnerability identifier: #VU25369

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8815

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BearFTP
Server applications / File servers (FTP/HTTP)

Vendor: IKTeam

Description

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

The vulnerability exists due to improper connection handling in the base connection handler. A remote attacker can cause a denial of service condition via a Slowloris approach by sending a large volume of small packets.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BearFTP: 0.0.1 - 0.3.0

---

External links
http://github.com/kolya5544/BearFTP
http://github.com/kolya5544/BearFTP/blob/f5a8047587c1a96456d4f291c12b038b9ab0d0c5/BearFTP/Program.cs#L503-L525
http://github.com/kolya5544/BearFTP/commit/17a6ead72d4a25cbfcef5e27613aa0a5f88a4b26
http://github.com/kolya5544/BearFTP/commit/66dc9d95e58bca133f265457d32007cdf38b66ad
http://github.com/kolya5544/BearFTP/releases/tag/0.4.0

---

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.