CVE-2021-46393

Public Exploit

Description

There is a stack buffer overflow vulnerability in the formSetPPTPServer function of Tenda-AX3 router V16.03.12.10_CN. The v10 variable is directly retrieved from the http request parameter startIp. Then v10 will be splice to stack by function sscanf without any security check,which causes stack overflow. By POSTing the page /goform/SetPptpServerCfg with proper startIp, the attacker can easily perform remote code execution with carefully crafted overflow data.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 3.51% Top 15%
Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX3/3 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-46393?
CVE-2021-46393 has been scored as a critical severity vulnerability.
How to fix CVE-2021-46393?
To fix CVE-2021-46393, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-46393 being actively exploited in the wild?
It is possible that CVE-2021-46393 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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