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2022-01-26
 
CVE-2022-23967

CWE-787
 
 
In TightVNC 1.3.10, there is an integer signedness error and resultant heap-based buffer overflow in InitialiseRFBConnection in rfbproto.c (for the vncviewer component). There is no check on the size given to malloc, e.g., -1 is accepted. This allocates a chunk of size zero, which will give a heap pointer. However, one can send 0xffffffff bytes of data, which can have a DoS impact or lead to remote code execution.

 
2021-11-23
 
CVE-2021-42785

CWE-120
 
 
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.

 
2009-02-04
 
CVE-2009-0388

CWE-189
 
 
Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.

 
2002-12-31
 
CVE-2002-1848

 
 
TightVNC before 1.2.4 running on Windows stores unencrypted passwords in the password text control of the WinVNC Properties dialog, which could allow local users to access passwords.

 
2003-03-03
 
CVE-2002-1511

 
 
The vncserver wrapper for vnc before 3.3.3r2-21 uses the rand() function instead of srand(), which causes vncserver to generate weak cookies.

 
2002-12-11
 
CVE-2002-1336

 
 
TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.

 
2002-09-24
 
CVE-2002-0971

 
 
Vulnerability in VNC, TightVNC, and TridiaVNC allows local users to execute arbitrary code as LocalSystem by using the Win32 Messaging System to bypass the VNC GUI and access the "Add new clients" dialogue box.

 

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