CVE Vulnerability

CVE-2021-42911

A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code.

7.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.8 /10

CVSS v3.0 : CRITICAL

V3 Legend

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

References
Link Resource
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835 Exploit Third Party Advisory
Configurations

Configuration 1
Information

Published : 2022-03-29 08:15

Updated : 2022-04-05 06:20

NVD link : CVE-2021-42911

Mitre link : CVE-2021-42911

Products Affected

Draytek

Vigor3900 Firmware

CWE
CWE-134

Use of Externally-Controlled Format String