DameWare Support Control fgets Vulnerability

Stack-based buffer overflow in the “Add from text file” feature in the DameWare Exporter tool (DWExporter.exe) in DameWare Remote Support 10.0.0.372, 9.0.1.247, and earlier allows user-assisted attackers to execute arbitrary code via unspecified vectors.

Recent assessments:

wchen-r7 at September 12, 2019 6:07pm UTC reported:

Version analyzed: DameWare Support Control 10.0.0.372

Vulnerability is due to the insecure usage of fgetws

””
.text:0040D6AA push edi ; FILE *
.text:0040D6AB lea ecx, [esp+2234h+var_2010]
.text:0040D6B2 push 1FF0h ; int
.text:0040D6B7 push ecx ; wchar_t *
.text:0040D6B8 call _fgetws ; bof here!

Later also in a loop:

while ( fgetws(&v20, 8176, v3) );

Unfortunately, no success searching for valid UNICODE pointers for ppr:

!py mona seh -all , manual exam of the results, any UNICODE compliant pointer :
”`

Vulnerable function is protected by stack cookies.

Assessed Attacker Value: 0
Assessed Attacker Value: 0Assessed Attacker Value: 0