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CVE-2020-5756

Quick assessment

Affected
Tenable Grandstream GWN7000
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.

Grandstream GWN7000是美国潮流网络（Grandstream）公司的一款企业级VPN路由器。 使用1.0.9.4及之前版本固件的Grandstream GWN7000中存在安全漏洞。远程攻击者可利用该漏洞修改系统的crontab，在路由器上执行任意操作系统命令。

AI Predicted 8.1 Difficulty: Moderate EPSS 2.47% · P83

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2020-5756

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
遗留的调试代码
Source: CVE Program / CVE List V5
Vulnerability Title
Grandstream GWN7000 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grandstream GWN7000是美国潮流网络（Grandstream）公司的一款企业级VPN路由器。 使用1.0.9.4及之前版本固件的Grandstream GWN7000中存在安全漏洞。远程攻击者可利用该漏洞修改系统的crontab，在路由器上执行任意操作系统命令。
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
Tenable Grandstream GWN7000 Versions 1.0.9.4 and below -

II. Public POCs for CVE-2020-5756

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III. Intelligence Information for CVE-2020-5756

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Other References for CVE-2020-5756 (1)

IV. Related Vulnerabilities

Same vendor: Tenable
Same weakness: CWE-489

V. Comments for CVE-2020-5756

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