CVE-2021-42911 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8