Advisory Details

December 15th, 2020

D-Link Multiple Routers dhttpd Authentication Bypass Vulnerability

ZDI-20-1427
ZDI-CAN-10912

CVE ID CVE-2020-27863
CVSS SCORE 6.5, (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
AFFECTED VENDORS D-Link
AFFECTED PRODUCTS Multiple Routers
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of D-Link DVA-2800 and DSL-2888A routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the dhttpd service, which listens on TCP port 8008 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise.

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=SAP10196
DISCLOSURE TIMELINE
  • 2020-06-12 - Vulnerability reported to vendor
  • 2020-12-15 - Coordinated public release of advisory
CREDIT chung96vn ft phieulang
BACK TO ADVISORIES