Upstream information

CVE-2021-42785 at MITRE


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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 7.5
Vector AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 9.8 8.8
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None Required
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1193024 [RESOLVED / INVALID]

No SUSE Security Announcements cross referenced.

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products past their end of life and not receiving proactive updates anymore.
SUSE Linux Enterprise Server 11 SP1 tightvnc Not affected
SUSE Linux Enterprise Server 11 SP3 tightvnc Not affected
SUSE Linux Enterprise Server 11 SP3-LTSS tightvnc Not affected
SUSE Linux Enterprise Server 11 SP4 tightvnc Not affected
SUSE Linux Enterprise Server 11 SP4-LTSS tightvnc Not affected

SUSE Timeline for this CVE

CVE page created: Wed Nov 24 05:00:15 2021
CVE page last modified: Fri Oct 13 21:26:45 2023