CVE Vulnerability

CVE-2021-41380

** DISPUTED ** RealVNC Viewer 6.21.406 allows remote VNC servers to cause a denial of service (application crash) via crafted RFB protocol data. NOTE: It is asserted that this issue requires social engineering a user into connecting to a fake VNC Server. The VNC Viewer application they are using will then hang, until terminated, but no memory leak occurs - the resources are freed once the hung process is terminated and the resource usage is constant during the hang. Only the process that is connected to the fake Server is affected. This is an application bug, not a security issue.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://gist.github.com/totaam/a90f2bb40f5b693ccec0ae903d021b03 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:realvnc:vnc_viewer:6.21.406:*:*:*:*:*:*:*
Information

Published : 2021-09-17 08:15

Updated : 2021-09-28 07:25

NVD link : CVE-2021-41380

Mitre link : CVE-2021-41380

Products Affected
No products.
CWE
CWE-20