#VU17399 Improper access control in DIR-823G - CVE-2019-7390

Vulnerability identifier: #VU17399

Vulnerability risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-7390

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DIR-823G
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: D-Link

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists in /bin/goahead due to incorrect access control. A remote unauthenticated attacker can hijack the DNS service configuration of all clients in the WLAN, without authentication, via the SetWanSettings HNAP API.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

DIR-823G: 1.02B03

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External links
https://github.com/leonW7/D-Link/blob/master/Vul_5.md

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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. However, proof of concept for this vulnerability is available.