CVE-2021-34203 Information

Description

D-Link DIR-2640-US 1.01B04 is vulnerable to Incorrect Access Control. Router ac2600 (dir-2640-us) when setting PPPoE will start quagga process in the way of whole network monitoring and this function uses the original default password and port. An attacker can easily use telnet to log in modify routing information monitor the traffic of all devices under the router hijack DNS and phishing attacks. In addition this interface is likely to be questioned by customers as a backdoor because the interface should not be exposed.

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Reference

https://www.dlink.com/en/security-bulletin/ http://d-link.com http://dir-2640-us.com https://github.com/liyansong2018/CVE/tree/main/2021/CVE-2021-34203

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.1