CVE-2021-34863: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication…

PriorityP359high8.8CVSS 3.1

AVAACLPRNUINSUCHIHAH

EPSS

1.43%

70.1th percentile

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the var:page parameter provided to the webproc endpoint. The issue results from the lack of proper validation of 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. Was ZDI-CAN-13271.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
d-link	dap-2020	—	—
dlink	dap-2020_firmware	<= 1.01	—

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv3.08.8HIGHCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv2.05.8MEDIUMAV:A/AC:L/Au:N/C:P/I:P/A:P

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