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CVE-2020-3923— TONNET DVR – Broken Access Control

Quick assessment

Affected
TONNET DVR
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tonnet TAT-76和TAT-77系列中存在访问控制错误漏洞，该漏洞源于DVR固件包含有错误配置的身份验证机制。攻击者可利用该漏洞破解默认密码并获取系统的访问权限。

CVSS 8.1 · High EPSS 1.68% · P76

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force
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I. Basic Information for CVE-2020-3923

Vulnerability Information
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Vulnerability Title
TONNET DVR – Broken Access Control
Source: CVE Program / CVE List V5
Vulnerability Description
DVR firmware in TAT-76 and TAT-77 series of products, provided by TONNET, contain misconfigured authentication mechanism. Attackers can crack the default password and gain access to the system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Tonnet TAT-76和TAT-77 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tonnet TAT-76和TAT-77系列中存在访问控制错误漏洞，该漏洞源于DVR固件包含有错误配置的身份验证机制。攻击者可利用该漏洞破解默认密码并获取系统的访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TONNET DVR 0 ~ 20191216 -
TONNET DVR 0 ~ 20200213 -

II. Public POCs for CVE-2020-3923

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III. Intelligence Information for CVE-2020-3923

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Other References for CVE-2020-3923 (2)

IV. Related Vulnerabilities

Same product: DVR
Same vendor: TONNET

V. Comments for CVE-2020-3923

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