#VU25770 Command Injection in Tonnet products - CVE-2020-3924

Vulnerability identifier: #VU25770

Vulnerability risk: High

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

CVE-ID: CVE-2020-3924

CWE-ID: CWE-77

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
TAT-77104G1
TAT-70432N
TAT-71416G1
TAT-71832G1
TAT-76104G3
TAT-76108G3
TAT-76116G3
TAT-76132G3

Software vendor:
Tonnet

The vulnerability allows a remote user to execute arbitrary commands on the system.

The vulnerability exists due to the DVR firmware does not properly verify patch files. A remote attacker can inject a specific command into a patch file and gain access to the system.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

• https://tvn.twcert.org.tw/taiwanvn/TVN-201910004
• https://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf