ZDI-23-1337: D-Link DIR-3040 HTTP Request Processing Referer Heap-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 heap-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 8.8. The following CVEs are assigned: CVE-2023-41229.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-23-1337?
The severity of ZDI-23-1337 is critical due to the potential for remote code execution without authentication.
How do I fix ZDI-23-1337?
To fix ZDI-23-1337, update your D-Link DIR-3040 router firmware to the latest version provided by D-Link.
Who is affected by ZDI-23-1337?
The users of D-Link DIR-3040 routers are affected by ZDI-23-1337.
What type of attack does ZDI-23-1337 facilitate?
ZDI-23-1337 facilitates network-adjacent attackers to execute arbitrary code on vulnerable routers.
Is authentication required to exploit ZDI-23-1337?
No, authentication is not required to exploit the vulnerability identified in ZDI-23-1337.