Vulnerability Details : CVE-2021-27705
Potential exploit
Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.
Vulnerability category: OverflowExecute code
Products affected by CVE-2021-27705
- cpe:2.3:o:tenda:g1_firmware:v15.11.0.17\(9502\)_cn:*:*:*:*:*:*:*
- cpe:2.3:o:tenda:g3_firmware:v15.11.0.17\(9502\)_cn:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27705
2.59%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 84 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27705
| 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-2021-27705
-
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.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-27705
-
https://hackmd.io/Zb7lfFaNR0ScpaTssECFbg
tenda overflow vulnerability - HackMDExploit;Third Party Advisory
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