#VU9565 Insecure DLL loading in TeamViewer

Vulnerability identifier: #VU9565

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: N/A

CWE-ID: CWE-427

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 compromise vulnerable system.

The vulnerability exists due to insecure C++ .dll loading mechanism when opening files. A remote attacker can place a file along with specially crafted .dll file on a remote SBM or WebDAV share, trick the victim into opening it, change TeamViewer permissions and execute arbitrary code on the target system with privileges of the current victim.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Install update from vendor's website.

Vulnerable software versions

TeamViewer: 13.0.5058

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External links
https://github.com/gellin/TeamViewer_Permissions_Hook_V1

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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.