CVE-2021-35005: teamviewer Improper Validation of Array Index

Vulnerability summary

CVE-2021-35005 is a low (CVSS 3.3) Improper Validation of Array Index vulnerability in teamviewer. EPSS estimates a 0.89% chance of exploitation in the next 30 days, higher than 58.9% of scored vulnerabilities.

Timeline

1. 24-01-2022
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

This vulnerability allows local attackers to disclose sensitive information on affected installations of TeamViewer. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the TeamViewer service. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated array. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-13818.

• CWE-129Improper Validation of Array IndexThe product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.
• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.