Tenda AC6/AC9/AC15/AC118 V15.03.05 httpd /goform/openSchedWifi schedStartTime/schedEndTime buffer overflow

Summaryinfo

A vulnerability has been found in Tenda AC6, AC9, AC15 and AC118 V15.03.05 and classified as critical. The affected element is an unknown function of the file /goform/openSchedWifi of the component httpd. This manipulation of the argument schedStartTime/schedEndTime as part of POST Request causes buffer overflow. This vulnerability is tracked as CVE-2020-13389. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in Tenda AC6, AC9, AC15 and AC118 V15.03.05. Affected by this vulnerability is an unknown part of the file /goform/openSchedWifi of the component httpd. The manipulation of the argument schedStartTime/schedEndTime as part of a POST Request leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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/openSchedWifi schedStartTime and schedEndTime 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.

The weakness was disclosed 05/22/2020. This vulnerability is known as CVE-2020-13389 since 05/22/2020. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-155561, VDB-155560, VDB-155559 and VDB-155558 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Tenda

Name

• AC6
• AC9
• AC15
• AC118

Version

• V15.03.05

License

• commercial

Website

• Vendor: https://www.tenda.com.cn/

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Duplicate

• Submit #XXXXXX: Xxxxx Xxx Xxx.xx.xx.xx Xxxxxx Xxxxxxxx (by Raining101)

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