D-Link DIR-1935 HNAP_AUTH Stack-based Buffer Overflow Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-1935 routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of Login requests to the web management portal. When parsing the HNAP_AUTH header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
Additional Details
D-Link has issued an update to correct this vulnerability. More details can be found at:
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10310
Disclosure Timeline
- 2022-06-14 - Vulnerability reported to vendor
- 2022-11-03 - Coordinated public release of advisory
Credit
Anonymous
