Arbitrary Code Execution Vulnerability in D-Link DAP-2020 Router
CVE-2021-34861

8.8HIGH

Key Information:

Vendor

D-link
Status
Dap-2020
Vendor
CVE Published:
25 October 2021

What is CVE-2021-34861?

A critical security flaw in the D-Link DAP-2020 router allows network-adjacent attackers to execute arbitrary code. The vulnerability stems from inadequate validation of the length of user-supplied data at the 'webproc' endpoint, which operates on TCP port 80 by default. This oversight permits attackers to exploit the buffer handling, resulting in code execution at the root level without the need for any authentication.

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Affected Version(s)

DAP-2020 1.01rc001

References

https://supportannouncement.us.dlink.com/announcement/pub...
x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-21-977/
x_refsource_MISC

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

chung96vn ft phieulang ft ChiTran
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