CVE-2021-42785

Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : 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

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.tightvnc.com/whatsnew.php	Release Notes Vendor Advisory
https://www.tightvnc.com/whatsnew.php	Release Notes Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:tightvnc:tightvnc:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:28

Type	Values Removed	Values Added
References	~~() https://www.tightvnc.com/whatsnew.php - Release Notes, Vendor Advisory~~	() https://www.tightvnc.com/whatsnew.php - Release Notes, Vendor Advisory

29 Nov 2021, 14:23

Type	Values Removed	Values Added
References	~~(MISC) https://www.tightvnc.com/whatsnew.php -~~	(MISC) https://www.tightvnc.com/whatsnew.php - Release Notes, Vendor Advisory
CPE		cpe:2.3:a:tightvnc:tightvnc::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 7.5 v3 : 9.8
CWE		CWE-120

23 Nov 2021, 22:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-11-23 22:15

Updated : 2024-11-21 06:28

NVD link : CVE-2021-42785

Mitre link : CVE-2021-42785

CVE.ORG link : CVE-2021-42785

JSON object : View

Products Affected

tightvnc

tightvnc

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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