TeamViewer had released an security update for CVE-2020-13699, a High risk vulnerability in TeamViewer for Windows with a CVSS base score of “8.8” that could be exploited by remote attackers to crack users’ password and thereupon, lead to further exploitation of a system. The vulnerability exists due to the application not properly quoting its custom URI handlers. Successful exploitation of this vulnerability could allow a remote attacker to launch TeamViewer with arbitrary parameters.
TeamViewer Windows Desktop Application prior to 8.0.258861, 9.0.258860, 10.0.258873,11.0.258870, 12.0.258869, 13.2.36220, 14.2.56676, 14.7.48350, and 15.8.3.
To address this vulnerability, TeamViewer has released a Update. For more information, please refer to our blog:
Use SanerNow platform to apply this High-risk patch quickly across the organization as shown below.
Vulnerability detection and patching of TeamViewer:
Login to SanerNow platform
Switch to the account/site specific view and Go to 'VM tool'
If your Operating system is vulnerable, Saner lists the above CVEs in 'Top Vulnerabilities or 'Recently Discovered Vulnerabilities' as shown in the below diagram:
Search for this vulnerability in VM tool. If you are affected, apply the patch through PM -> Missing Patches.
Select 'Groups/Devices' in the 'Asset Source' section and click 'Apply'.
Select TeamViewer from the 'Asset' section as shown in the below image:
Select ‘Apply Selected Patches’ at the rightmost corner. This will prompt for ‘Creating Patch Task’. Fill in ‘Task Name’ and ‘Remediation Schedule' as per your preference and click on ‘Apply Selected Patches' as shown below:
Remediation job will be created, which will fix the vulnerability by upgrading Operating system to the latest build version.
Once remediation is done, the Saner agent automatically scans again and uploads the result to SanerNow as shown below: