CVE-2020-13393 — CRITICAL (9.8)

Vulnerability Description

An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the /goform/saveParentControlInfo deviceId and time parameters for a POST request, a value is directly used in a strcpy to a local variable placed on the stack, which overwrites the return address of a function. An attacker can construct a payload to carry out arbitrary code execution attacks.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tendacn	Ac6 Firmware	v15.03.05.19_multi_td01
Tendacn	Ac6	1.0
Tendacn	Ac9 Firmware	v15.03.05.19\(6318\)
Tendacn	Ac9	1.0
Tendacn	Ac15 Firmware	v15.03.05.19_multi_td01
Tendacn	Ac15	1.0
Tendacn	Ac18 Firmware	v15.03.05.19\(6318\)
Tendacn	Ac18	-

Related Weaknesses (CWE)

CWE-120

References

https://joel-malwarebenchmark.github.ioExploitThird Party Advisory
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13393-Tenda-vulExploitThird Party Advisory
https://joel-malwarebenchmark.github.ioExploitThird Party Advisory
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13393-Tenda-vulExploitThird Party Advisory

FAQ

What is CVE-2020-13393?

CVE-2020-13393 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devic...

How severe is CVE-2020-13393?

CVE-2020-13393 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2020-13393?

Check the references section above for vendor advisories and patch information. Affected products include: Tendacn Ac6 Firmware, Tendacn Ac6, Tendacn Ac9 Firmware, Tendacn Ac9, Tendacn Ac15 Firmware.