CVE-2020-27863 Auth bypass in Multiple Routers
Network-adjacent attackers can bypass authentication on D-Link routers to disclose stored credentials via flawed string matching in the dhttpd service.
- 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-2020-27863?
CVE-2020-27863 is a medium-severity authentication bypass vulnerability in D-Link Multiple Routers, published on 11 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of D-Link DVA-2800 and DSL-2888A routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the dhttpd service, which listens on TCP port 8008 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-10912.
Which versions are affected by CVE-2020-27863?
It affects 2 products.
Products include Dlink Dsl-2888a Firmware, Dlink Dva-2800 Firmware.
How do I fix CVE-2020-27863?
No fix has been published for CVE-2020-27863 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-27863 being exploited?
There is no known exploitation of CVE-2020-27863 in the wild and no public exploit code.
Other vulnerabilities in D-Link Multiple Routers
Sources
Also known as GHSA-wpfj-wc8p-wv72.