PT-2021-17251 · D Link · D-Link Dir-816 A2

Published 2021-04-14 · Updated 2021-04-20 · CVE-2021-27114

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: D-Link DIR-816 A2 version 1.10 B05

Description: An issue was discovered that could lead to a Stack-Based Buffer Overflow. This occurs when a very long text entry is made for the s ip and s mac fields within the handler function of the "/goform/addassignment" route, potentially allowing the return address to be overwritten.

Recommendations: For D-Link DIR-816 A2 version 1.10 B05, as a temporary workaround, consider restricting access to the "/goform/addassignment" route until a patch is available. Avoid using very long text entries for the s ip and s mac fields in this route to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-27114

Affected Products

D-Link Dir-816 A2

References · 4

• 🔥❌ https://github.com/GD008/vuln/blob/main/DIR-816_stackoverflow.md · Exploit, Deleted
• https://osv.dev/vulnerability/CVE-2021-27114 · Vendor Advisory
• https://dlink.com/en/security-bulletin · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-27114 · Security Note