CVE-2021-28839 — HIGH (7.5)

Vulnerability Description

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_certificate function of sbin/httpd binary. When the binary handle the specific HTTP GET request, the strrchr in the upload_certificate function would take NULL as first argument, and incur the NULL pointer dereference vulnerability.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Dlink	Dap-2310 Firmware	2.0.7.rc031
Dlink	Dap-2310	-
Dlink	Dap-2330 Firmware	1.07.rc028
Dlink	Dap-2330	-
Dlink	Dap-2360 Firmware	2.07.rc043
Dlink	Dap-2360	-
Dlink	Dap-2553 Firmware	3.06.rc027
Dlink	Dap-2553	-
Dlink	Dap-2660 Firmware	1.13.rc074
Dlink	Dap-2660	-
Dlink	Dap-2690 Firmware	3.16.rc100
Dlink	Dap-2690	-
Dlink	Dap-2695 Firmware	1.17.rc063
Dlink	Dap-2695	-
Dlink	Dap-3320 Firmware	1.01.rc014
Dlink	Dap-3320	-
Dlink	Dap-3662 Firmware	1.01.rc022
Dlink	Dap-3662	-

Related Weaknesses (CWE)

CWE-476

References

https://github.com/zyw-200/EQUAFL/blob/main/dlink-email-cve.pdfExploitThird Party Advisory
https://github.com/zyw-200/EQUAFL/blob/main/dlink-email-cve2.pdfThird Party Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory
https://github.com/zyw-200/EQUAFL/blob/main/dlink-email-cve.pdfExploitThird Party Advisory
https://github.com/zyw-200/EQUAFL/blob/main/dlink-email-cve2.pdfThird Party Advisory
https://www.dlink.com/en/security-bulletin/Vendor Advisory

FAQ

What is CVE-2021-28839?

CVE-2021-28839 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.RC06...

How severe is CVE-2021-28839?

CVE-2021-28839 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-28839?

Check the references section above for vendor advisories and patch information. Affected products include: Dlink Dap-2310 Firmware, Dlink Dap-2310, Dlink Dap-2330 Firmware, Dlink Dap-2330, Dlink Dap-2360 Firmware.