Home/CVE/This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2
CVE

CVE-2021-34862

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2

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:menu 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-13270.

HIGH · CVSS 8.8 EPSS 0.01524
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-121Stack-based Buffer Overflow
▤

Affected Products & Versions

1
dlink dap-2020 firmware<= 1.01
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.1 · zdi-disclosures@trendmicro.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Oct 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-978/Third Party AdvisoryVDB Entry
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