ZDI-23-1336: D-Link DIR-3040 prog.cgi SetUsersSettings 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 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 required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 6.8. The following CVEs are assigned: CVE-2023-41228.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-23-1336?
The severity of ZDI-23-1336 is considered critical due to the potential for arbitrary code execution by attackers.
How do I fix ZDI-23-1336?
To fix ZDI-23-1336, update your D-Link DIR-3040 router firmware to the latest version as provided by D-Link.
Who is affected by ZDI-23-1336?
Users of D-Link DIR-3040 routers running vulnerable firmware versions are affected by ZDI-23-1336.
What type of attackers can exploit ZDI-23-1336?
Network-adjacent attackers can exploit ZDI-23-1336 but authentication is required for the attack.
What is the nature of the vulnerability identified as ZDI-23-1336?
ZDI-23-1336 involves a flaw in the prog.cgi binary that handles HNAP requests, leading to the potential execution of arbitrary code.