Title: RealVNC 4.1.2 'vncviewer.exe' Remote Denial of Service Vulnerability
Severity: MODERATE
Description:
RealVNC (Virtual Network Computing) allows users to access remote computers for administration purposes.
RealVNC is prone to a remote denial-of-service vulnerability because it fails to perform adequate boundary checks on user-supplied data. This issue occurs in the Windows Client ('vncviewer.exe') when using the 'RFB 003.008' protocol with no security settings. An attacker can exploit this issue by sending a malicious frame buffer to the application via TCP port 5900.
Successfully exploiting this issue will allow the attacker to crash the affected application, denying service to legitimate users. Given the nature of this issue, the attacker may also be able to execute arbitrary code, but this has not been confirmed.
RealVNC 4.1.2 is vulnerable; other versions may also be affected.
Affected Products:
- RealVNC RealVNC 4.1.2
References:
- RealVNC: RealVNC Homepage
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
