UBUNTU-CVE-2021-42785

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2021-42785
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42785.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-42785
Upstream
  • CVE-2021-42785
Published
2021-11-23T22:15:00Z
Modified
2025-10-24T04:50:36Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:16.04:LTS / tightvnc

Package

Name
tightvnc
Purl
pkg:deb/ubuntu/tightvnc@1.3.10-0ubuntu3?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.3.10-0ubuntu2
1.3.10-0ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.10-0ubuntu3",
            "binary_name": "tightvncserver"
        },
        {
            "binary_version": "1.3.10-0ubuntu3",
            "binary_name": "xtightvncviewer"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-42785.json"