#VU22562 Improper control of interaction frequency in TeamViewer - CVE-2018-16550

Vulnerability identifier: #VU22562

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-16550

CWE-ID: CWE-799

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TeamViewer
Client/Desktop applications / Other client software

Vendor: TeamViewer

Description

The vulnerability allows a remote attacker to perform a brute-force attack on the target system.

The vulnerability exists due to the application does not implement sufficient measures to prevent multiple failed authentication attempts. A remote attacker can bypass the brute-force authentication protection mechanism by skipping the "Cancel" step, which makes it easier to determine the correct value of the default 4-digit PIN.

Mitigation
 Note: This vulnerability affects TeamViewer versions 10.x through 13.x. Install updates from vendor's website.

Vulnerable software versions

TeamViewer: All versions

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External links
https://twitter.com/vah_13/status/1036894081350291457

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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.