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 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.

CVSS v3.0 8.8 HIGH
CVSS v2.0 5.8 MEDIUM

8.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:A/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 6.5 / Impact : 6.4

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201	Patch Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-979/	Third Party Advisory VDB Entry

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:d-link:dap-2020_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:d-link:dap-2020:*:*:*:*:*:*:*:*

Information

Published : 2021-10-25 10:15

Updated : 2021-10-27 09:27

NVD link : CVE-2021-34863

Mitre link : CVE-2021-34863

JSON object : View

CWE

CWE-121

Stack-based Buffer Overflow

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Products Affected

d-link

dap-2020_firmware
dap-2020

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