Vulnerability identifier: #VU18943

Vulnerability risk: Medium

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

CVE-ID: N/A

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FileZilla
Client/Desktop applications / File managers, FTP clients

Vendor: FileZilla

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to insufficient validation of filenames that contain double-quotation marks when opening or editing files. A remote unauthenticated attacker that controls a remote server can trick the victim to connect to a malicious server to open a file with a specially crafted filename and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FileZilla: 3.40.0 - 3.43.0 rc2

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External links
http://filezilla-project.org/versions.php#3.43.0

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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.