CVE-2021-28846

A Format String vulnerablity exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03, which could let a remote malicious user cause a denial of service due to a logic bug at address 0x40dcd0 when calling fprintf with "%s: key len = %d, too long\n" format. The two variables seem to be put in the wrong order. The vulnerability could be triggered by sending the POST request to apply_cgi with a long and unknown key in the request body.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 4.0 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/zyw-200/EQUAFL/blob/main/TRENDnet%20ticket.pdf	Third Party Advisory

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Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:trendnet:tew-755ap_firmware:1.11b03:*:*:*:*:*:*:*

cpe:2.3:h:trendnet:tew-755ap:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:trendnet:tew-755ap2kac_firmware:1.11b03:*:*:*:*:*:*:*

cpe:2.3:h:trendnet:tew-755ap2kac:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:trendnet:tew-821dap2kac_firmware:1.11b03:*:*:*:*:*:*:*

cpe:2.3:h:trendnet:tew-821dap2kac:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:trendnet:tew-825dap_firmware:1.11b03:*:*:*:*:*:*:*

cpe:2.3:h:trendnet:tew-825dap:-:*:*:*:*:*:*:*

Information

Published : 2021-08-10 13:15

Updated : 2021-08-19 10:12

NVD link : CVE-2021-28846

Mitre link : CVE-2021-28846

JSON object : View

CWE

CWE-134

Use of Externally-Controlled Format String

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Products Affected

trendnet

tew-825dap
tew-755ap
tew-821dap2kac
tew-755ap2kac
tew-755ap2kac_firmware
tew-755ap_firmware
tew-821dap2kac_firmware
tew-825dap_firmware

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