CVE-2021-27705
Severity Score
9.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
1
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Un desbordamiento de búfer en los enrutadores Tenda versiones G1 y G3 con firmware v15.11.0.17(9502) _CN, permite a atacantes remotos ejecutar código arbitrario por medio de una petición diseñada action/"qosIndex". Esto ocurre porque la función "formQOSRuleDel" pasa directamente el parámetro "qosIndex" a strcpy sin límite
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-02-25 CVE Reserved
- 2021-04-14 CVE Published
- 2024-08-03 CVE Updated
- 2024-08-03 First Exploit
- 2024-12-17 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC
References (1)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|---|---|
| https://hackmd.io/Zb7lfFaNR0ScpaTssECFbg | 2024-08-03 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Tenda Search vendor "Tenda" | G1 Firmware Search vendor "Tenda" for product "G1 Firmware" | v15.11.0.17\(9502\)_cn Search vendor "Tenda" for product "G1 Firmware" and version "v15.11.0.17\(9502\)_cn" | - |
Affected
| in | Tenda Search vendor "Tenda" | G1 Search vendor "Tenda" for product "G1" | - | - |
Safe
|
| Tenda Search vendor "Tenda" | G3 Firmware Search vendor "Tenda" for product "G3 Firmware" | v15.11.0.17\(9502\)_cn Search vendor "Tenda" for product "G3 Firmware" and version "v15.11.0.17\(9502\)_cn" | - |
Affected
| in | Tenda Search vendor "Tenda" | G3 Search vendor "Tenda" for product "G3" | - | - |
Safe
|