ZDI-CAN-21674: ZDI-23-1338: D-Link DIR-3040 HTTP Request Processing Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the prog.cgi binary, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of a user-supplied string before copying it to a fixed size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
Other sources
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2023-41230.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-CAN-21674?
The severity of ZDI-CAN-21674 is critical due to the potential for remote code execution.
How do I fix ZDI-CAN-21674?
To fix ZDI-CAN-21674, update your D-Link DIR-3040 router to the latest firmware version provided by D-Link.
Who is affected by ZDI-CAN-21674?
ZDI-CAN-21674 affects all installations of D-Link DIR-3040 routers that have the vulnerable firmware.
Can ZDI-CAN-21674 be exploited without authentication?
Yes, ZDI-CAN-21674 can be exploited without any authentication, making it particularly dangerous.
What component is vulnerable in ZDI-CAN-21674?
The prog.cgi binary that handles HNAP requests is the specific component vulnerable in ZDI-CAN-21674.