CVE-2021-46393

critical · 9.8

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.

9.8

CVSS

15.9%

EPSS (exploit prob.)

97th

EPSS percentile

2022-03-04

Published

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

Weaknesses

CWE-787

Affected products

Vendor	Product	Affected versions
tenda	ax3_firmware	16.03.12.10
tenda	ax3	all versions

Check a specific version with /api/v1/cve/match.

References

https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX3/3
https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX3/3

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-46393