CVE-2021-46393

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.

CVSS v3.1

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

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

15.92% chance of exploitation in the next 30 days, 97th percentile

Published

2022-03-04

Updated

2024-08-04

Proof-of-concept exploits (1)

• sec-bin/IoT-CVE/tree/main/Tenda/AX3/3

References

• CVE Record
• NVD entry

Related

• CVE-2021-45391
• CVE-2021-45392
• CVE-2021-46394
• CVE-2021-46408
• CVE-2022-24995
• CVE-2022-25546