Newly identified botnet targets decade-old flaw in unpatched D

The D-Link DIR-645 wired/wireless router is vulnerable to OS command injection (CWE-77) in its HNAP interface: input supplied to the GetDeviceSettings action is not properly neutralized, so a remote attacker who sends a crafted HTTP request to the router's HNAP endpoint can have arbitrary operating-system commands executed on the device. Successful exploitation gives the attacker control of the router at the system level, enabling reconfiguration or abuse of the device, traffic interception or redirection, and recruitment into IoT botnets, as reflected in recent Moobot/MooBot botnet campaigns. Any site or household still running a DIR-645, especially one whose web/HNAP management interface is reachable from the internet, is affected; the product is end-of-life. The flaw is under active exploitation: it was added to CISA's Known Exploited Vulnerabilities catalog on 2022-02-10, and EPSS assigns a 97.1% probability of exploitation within 30 days (100th percentile). CISA's required action reflects the risk: disconnect the impacted product if it is still in use because it has reached end-of-life.

Do: Because the DIR-645 is end-of-life, CISA's required action is to disconnect it; replace the device where possible, or at minimum apply the latest available D-Link firmware for the DIR-645 and ensure the management/HNAP interface is not reachable from the internet (block or restrict remote administration on the WAN side). Check the device for signs of botnet infection, such as unexpected outbound traffic or unexpected HNAP POST/SOAP requests, and prioritize this fix given the 97.1% EPSS score and known in-the-wild exploitation.

D-Link DNS-320L, DNS-325, DNS-327L, and DNS-340L network-attached storage devices contain a command injection flaw (CWE-77) in which attacker-controlled input is passed to an underlying system shell. The flaw can be triggered remotely, and when chained with the related CVE-2024-3272 it allows an unauthenticated attacker to execute arbitrary commands on the device without credentials. Successful exploitation gives an attacker full control over the affected NAS, providing a foothold for data theft, malware deployment, or further network compromise. Users of these legacy D-Link NAS models are affected; all hardware revisions of these products have reached end-of-life or end-of-service, so no routine security updates are being delivered through the normal lifecycle. The vulnerability was added to CISA's Known Exploited Vulnerabilities catalog on 2024-04-11, indicating exploitation in the wild, with a very high EPSS probability of near-term exploitation.

Do: Because these devices are EOL/EOS, retire and replace them per D-Link's lifecycle guidance rather than waiting for a patch; check vendor channels for any interim firmware releases. As an interim mitigation, disconnect these NAS devices from direct internet access or restrict access via firewall rules, and review device/web server logs for suspicious requests indicating command injection attempts.