Vulnerability identifier: #VU16990

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-6109

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

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

Vendor: winscp.sourceforge.net

Description
The vulnerability allows a remote attacker to conduct spoofing attack on the target system.

The weakness exists due to accepting and displaying arbitrary stderr output from the scp server by the scp client. A malicious SCP server can use the object name to manipulate the client output, for example to employ ANSI codes to hide additional files being transferred.

Mitigation
Update to version 5.14.

Vulnerable software versions

WinSCP: 5.0 - 5.13.7

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External links
http://sintonen.fi/advisories/scp-client-multiple-vulnerabilities.txt

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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.