CVE-2021-27691

Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted action/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 10.0 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

10.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 10.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://hackmd.io/@aZYpdinUS2SD-yhAeHwOkw/rkhTCGzMd	Exploit Third Party Advisory

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Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:tendacn:g0_firmware:15.11.0.5\(5876\)_cn:::::::*
	cpe:2.3:o:tendacn:g0_firmware:15.11.0.6\(9039\)_cn:::::::*

cpe:2.3:h:tendacn:g0:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

OR	cpe:2.3:o:tendacn:g1_firmware:15.11.0.17\(9502\)_cn:::::::*
	cpe:2.3:o:tendacn:g1_firmware:15.11.0.16\(9024\)_cn:::::::*

cpe:2.3:h:tendacn:g1:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

OR	cpe:2.3:o:tendacn:g3_firmware:15.11.0.16\(9024\)_cn:::::::*
	cpe:2.3:o:tendacn:g3_firmware:15.11.0.17\(9502\)_cn:::::::*

cpe:2.3:h:tendacn:g3:-:*:*:*:*:*:*:*

Information

Published : 2021-04-15 17:15

Updated : 2022-07-12 10:42

NVD link : CVE-2021-27691

Mitre link : CVE-2021-27691

JSON object : View

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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Products Affected

tendacn

g1
g3
g0_firmware
g3_firmware
g1_firmware
g0

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