Vulnerability identifier: #VU25769

Vulnerability risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-3923

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TAT-77104G1
Hardware solutions / Other hardware appliances
TAT-70432N
Hardware solutions / Other hardware appliances
TAT-71416G1
Hardware solutions / Other hardware appliances
TAT-71832G1
Hardware solutions / Other hardware appliances
TAT-76104G3
Hardware solutions / Other hardware appliances
TAT-76108G3
Hardware solutions / Other hardware appliances
TAT-76116G3
Hardware solutions / Other hardware appliances
TAT-76132G3
Hardware solutions / Other hardware appliances

Vendor: Tonnet

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to misconfigured authentication mechanism in DVR firmware. A remote attacker can bypass implemented security restrictions and gain unauthorized access to the application.

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

Vulnerable software versions

TAT-77104G1: 20190107

TAT-70432N: 20181225

TAT-71416G1: 20181225

TAT-71832G1: 20190510

TAT-76104G3: 76104G3

TAT-76108G3: 76208G3

TAT-76116G3: 76216G3

TAT-76132G3: 20181221-1

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External links
http://tvn.twcert.org.tw/taiwanvn/TVN-201910003
http://www.chtsecurity.com/news/4ef5eb3a-fdc3-4d78-8dd7-ec7213e2bbcf

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Q & A

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.