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CVE-2021-41380
Detail
Disputed
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Current Description
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
** 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.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
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** 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 conn
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 fa
Initial Analysis by NIST9/28/2021 3:25:29 PM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:a:realvnc:vnc_viewer:6.21.406:*:*:*:*:*:*:*
Added
CVSS V2
NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Added
CVSS V2 Metadata
Victim must voluntarily interact with attack mechanism
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Added
CWE
NIST CWE-20
Changed
Reference Type
https://gist.github.com/totaam/a90f2bb40f5b693ccec0ae903d021b03 No Types Assigned
https://gist.github.com/totaam/a90f2bb40f5b693ccec0ae903d021b03 Exploit, Third Party Advisory
CVE Modified by MITRE9/24/2021 12:15:08 PM
Action
Type
Old Value
New Value
Changed
Description
RealVNC Viewer 6.21.406 allows remote VNC servers to cause a denial of service (application crash) via crafted RFB protocol data.
** 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 conn
Quick Info
CVE Dictionary Entry: CVE-2021-41380 NVD
Published Date: 09/17/2021 NVD
Last Modified: 04/10/2024
Source: MITRE