PT-2020-6512 · D Link · D-Link Dap-2020

Chung96Vn + 2 · Published 2020-03-12 · Updated 2023-04-26 · CVE-2021-34862

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions D-Link DAP-2020 version 1.01rc001

Description The issue is related to a stack-based buffer overflow when handling the var:menu parameter provided to the "webproc" endpoint. This occurs due to 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. No authentication is required to exploit this vulnerability.

Recommendations For D-Link DAP-2020 version 1.01rc001, as a temporary workaround, consider disabling the webproc endpoint until a patch is available. Restrict access to the var:menu parameter to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2021-05726

CVE-2021-34862

ZDI-21-978

Affected Products

D-Link Dap-2020

References · 8

• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34862 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-978 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34862 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05726 · Security Note
• https://t.me/cibsecurity/31164 · Telegram Post
• https://t.me/cvenotify/49123 · Telegram Post
• https://t.me/cvenotify/22486 · Telegram Post