CVE-2021-34203 Hardcoded credentials in n/a
Attackers can exploit hardcoded credentials in the Quagga process to gain telnet access, modify routing, and monitor traffic on D-Link DIR-2640-US routers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34203?
CVE-2021-34203 is a high-severity vulnerability in n/a, published on 16 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-1188
Which versions are affected by CVE-2021-34203?
It affects 1 product.
Products include Dlink Dir-2640-Us Firmware.
How do I fix CVE-2021-34203?
No fix has been published for CVE-2021-34203 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34203 being exploited?
There is no known exploitation of CVE-2021-34203 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-gr4j-7v97-rrfc.