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.
Classic Buffer Overflow
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GovTech CSGCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 75%
VendorProductVersion
tightvnctightvnc
𝑥
≤ 2.8.59
𝑥
= Vulnerable software versions
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
tightvnc
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
not-affected
focal
not-affected
bionic
not-affected
xenial
needed
trusty
not-affected
Common Weakness Enumeration
References
https://www.tightvnc.com/whatsnew.php
https://www.tightvnc.com/whatsnew.php