New Zoom Flaw Let Attackers to Hack into the Systems of Participants via Chat Messages

Security researchers from Talos discovered two vulnerabilities with the popular Zoom video chatting that allows a malicious user in the conference to execute arbitrary code on victims’ machines.

Zoom is a popular video conferencing software across the globe that are used by individuals across the globe to work from and to stay in touch with friends and family.

Both of the vulnerabilities are path traversal and it was reported to Talos by Zoom and it was fixed by Zoom in May.

The flaws can be exploited by attackers to execute or place or to write files on the vulnerable installations.

TALOS-2020-1055/CVE-2020-6109

The vulnerability exists with Zoom client, version 4.6.10, an attacker can exploit the vulnerability by sending a specially crafted message to a target user or a group to exploit this vulnerability.

The vulnerability is due to Improper Limitation of a Pathname to a restricted directory causes Path traversal, a specifically crafted message leads to arbitrary file write, which can be used to achieve arbitrary code execution.

“The actual vulnerability lies in the fact that filenames are not sanitized in any way and allow for directory traversal. This means that a specially crafted id attribute of the giphy tag could contain a special file path that would write a file outside Zoom’s install directory and indeed in any directory writable by the current user,” reads the advisory.

TALOS-2020-1056/CVE-2020-6110

Another one is the exploitable vulnerability that exists with Zoom Client version 4.6.10 & 4.6.11. A crafted message from the attacker leads to arbitrary binary planting which could be abused to achieve arbitrary code execution.

An attacker could trigger the vulnerability by sending a crafted message to a target user or a group to trigger this vulnerability, according to the advisory.

Starting this coronavirus pandemic, many companies around the world asked employees to work from home, which increases the usage of video conferencing apps.

In the current situation, most of the organization has been closed and the employees are provided with options to work from home. So the RDP and the video communication platforms are heavily targeted by attackers.

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