Vulnerability Details : 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.
Vulnerability category: OverflowMemory CorruptionExecute code
Products affected by CVE-2021-46393
- cpe:2.3:o:tenda:ax3_firmware:16.03.12.10:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-46393
0.81%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 82 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-46393
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-46393
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-46393
-
https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX3/3
IoT-CVE/Tenda/AX3/3 at main · sec-bin/IoT-CVE · GitHubExploit;Third Party Advisory
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