CVE-2021-34861

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 webproc endpoint, which listens on TCP port 80 by default. 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-12104.

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-21-977/	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 08:44

NVD link : CVE-2021-34861

Mitre link : CVE-2021-34861

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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