Advisory Details

February 24th, 2020

D-Link Multiple Routers HNAP strncmp Incorrect Comparison Authentication Bypass Vulnerability

CVE ID	CVE-2020-8864
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	D-Link
AFFECTED PRODUCTS	Multiple Routers
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP login requests. The issue results from the lack of proper handling of empty passwords. An attacker can leverage this vulnerability to execute arbitrary code on the router.
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=SAP10157
DISCLOSURE TIMELINE	2019-12-27 - Vulnerability reported to vendor 2020-02-24 - Coordinated public release of advisory
CREDIT	chung96vn - Security Researcher of VinCSS (Member of Vingroup)

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