CVE Vulnerability

CVE-2021-28840

Null Pointer Dereference vulnerability exists in D-Link DAP-2310 2.07.RC031, DAP-2330 1.07.RC028, DAP-2360 2.07.RC043, DAP-2553 3.06.RC027, DAP-2660 1.13.RC074, DAP-2690 3.16.RC100, DAP-2695 1.17.RC063, DAP-3320 1.01.RC014 and DAP-3662 1.01.RC022 in the upload_config function of sbin/httpd binary. When the binary handle the specific HTTP GET request, the content in upload_file variable is NULL in the upload_config function then the strncasecmp would take NULL as first argument, and incur the NULL pointer dereference vulnerability.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.dlink.com/en/security-bulletin/ Vendor Advisory
https://github.com/zyw-200/EQUAFL/blob/main/dlink-email-cve.pdf Exploit Third Party Advisory
https://github.com/zyw-200/EQUAFL/blob/main/dlink-email-cve2.pdf Third Party Advisory
Configurations

Configuration 1
Information

Published : 2021-08-10 06:15

Updated : 2021-08-17 03:01

NVD link : CVE-2021-28840

Mitre link : CVE-2021-28840

Products Affected
No products.
CWE
CWE-476