Patch Now: CISA Warns of Actively Exploited D-Link Router Vulnerabilities

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) announced that two security flaws in D-Link routers have been added to its list of actively exploited vulnerabilities.

The list of vulnerabilities is as follows:

CVE-2014-100005 :
A vulnerability that allows an attacker to manipulate D-Link DIR-600 router configurations by taking over an existing administrator session

CVE-2021-40655:
An information disclosure vulnerability affecting D-Link DIR-605 routers that enables attackers to acquire a username and password via an HTTP POST request to the /getcfg.php page.

There is no information available on how these weaknesses are being exploited in real-world situations, but federal agencies have been advised to use the solutions provided by the vendors before June 6, 2024.

CVE-2014-100005 affects old D-Link products that are no longer supported, so organizations should retire and replace these devices.

The SSD Secure Disclosure team found security issues in DIR-X4860 routers that allow remote attackers to access the HNAP port, gain elevated permissions, and run commands as root.

“By combining an authentication bypass with command execution the device can be completely compromised,” it said, adding the issues impact routers running firmware version DIRX4860A1_FWV1.04B03.

SSD Secure Disclosure has provided a proof-of-concept exploit that uses a customized HNAP login request to bypass authentication protections on a router’s management interface. The exploit takes advantage of a command injection vulnerability to achieve code execution.

D-Link has since acknowledged the issue in a bulletin of its own, stating a fix is “Pending Release / Under Development.” It described the vulnerability as a case of LAN-side unauthenticated command execution flaw.