Vulnerability identifier: #VU27058

Vulnerability risk: Low

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2020-9279

CWE-ID: CWE-798

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
DSL-2640B
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: D-Link

Description

The vulnerability allows a remote attacker to gain full access to vulnerable system.

The vulnerability exists due to presence of hard-coded credentials in application code in the "libpsi.so" library. A remote attacker on the local network can access the affected system using the hard-coded credentials, perform critical tasks and take full control of the device.

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

This vulnerability affects devices with the following versions:

• Hardware version: B2
• Firmware version: ver.4.01

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

Vulnerable software versions

DSL-2640B: 4.01

---

External links
http://raelize.com/advisories/CVE-2020-9279_D-Link-DSL-2640B_Hard-coded-privileged-account_v1.0.txt
http://raelize.com/posts/d-link-dsl-2640b-security-advisories/
http://www.dlink.com/en/security-bulletin

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

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.