Vulnerability identifier: #VU29530

Vulnerability risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2020-13160

CWE-ID: CWE-134

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
AnyDesk for Linux
Client/Desktop applications / Software for system administration
AnyDesk for BSD
Client/Desktop applications / Software for system administration

Vendor: AnyDesk Software GmbH

Description

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

The vulnerability exists due to a format string error when processing hostames. A remote attacker can supply a specially crafted input that contains format string specifiers and execute arbitrary code 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

AnyDesk for Linux: 5.0.0 - 5.5.2

AnyDesk for BSD: 5.1.0 - 5.5.2

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External links
http://packetstormsecurity.com/files/158291/AnyDesk-GUI-Format-String-Write.html
http://devel0pment.de/?p=1881
http://download.anydesk.com/changelog.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. However, a fully functional exploit for this vulnerability is available.