Vulnerability identifier: #VU72386

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-15415

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Vigor 2960
Hardware solutions / Routers & switches, VoIP, GSM, etc
Vigor 3900
Hardware solutions / Routers & switches, VoIP, GSM, etc
Vigor 300B
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor:

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within the "cgi-bin/mainfunction.cgi/cvmcfgupload" script. A remote unauthenticated attacker can send specially crafted HTTP request to the device and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://github.com/CLP-team/Vigor-Commond-Injection
http://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-remote-code-injection/execution-vulnerability-(cve-2020-14472)/

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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.