CVE-2021-41380

Published on: 09/17/2021 12:00:00 AM UTC

Last Modified on: 09/28/2021 07:25:00 PM UTC

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Certain versions of Vnc Viewer from Realvnc contain the following vulnerability:

** 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.

  • CVE-2021-41380 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 6.5 - MEDIUM

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE REQUIRED
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED NONE NONE HIGH

CVSS2 Score: 4.3 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK MEDIUM NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
NONE NONE PARTIAL

CVE References

Description Tags Link
denial of service via a crafted frame buffer update packet · GitHub gist.github.com
text/html
URL Logo MISC gist.github.com/totaam/a90f2bb40f5b693ccec0ae903d021b03

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationRealvncVnc Viewer6.21.406AllAllAll
  • cpe:2.3:a:realvnc:vnc_viewer:6.21.406:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-41380 : RealVNC Viewer 6.21.406 allows remote VNC servers to cause a denial of service application crash… twitter.com/i/web/status/1… 2021-09-17 20:05:47
Twitter Icon @0_exploit CVE-2021-41380 dlvr.it/S7nMqb 2021-09-17 22:43:01
© CVE.report 2021 Twitter Nitter Twitter Viewer |

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