Attacker Value
Unknown
Advantech WebAccess Webvrpcs Service Opcode 80061 Stack Buffer Overflow
Attacker Value
Unknown
(1 user assessed)
Exploitability
Unknown
(1 user assessed)User Interaction
Unknown
Privileges Required
Unknown
Attack Vector
Unknown
Advantech WebAccess Webvrpcs Service Opcode 80061 Stack Buffer Overflow
(Last updated October 05, 2023) ▾
MITRE ATT&CK
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Metasploit Module
Description
A Stack-based Buffer Overflow issue was discovered in Advantech WebAccess versions prior to V8.2_20170817. The application lacks proper validation of the length of user-supplied data prior to copying it to a stack-based buffer, which could allow an attacker to execute arbitrary code under the context of the process.
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Technical Analysis
The stack overflow happens in sub_10004BC8:
.text:10004BC8 ; int __cdecl sub_10004BC8(char *Format, char) .text:10004BC8 sub_10004BC8 proc near ; .text:10004BC8 ; .text:10004BC8 .text:10004BC8 lpWindowName = dword ptr -818h .text:10004BC8 hWnd = dword ptr -814h .text:10004BC8 lpClassName = dword ptr -810h .text:10004BC8 Args = dword ptr -80Ch .text:10004BC8 lpBaseAddress = dword ptr -808h .text:10004BC8 hFileMappingObject= dword ptr -804h .text:10004BC8 Dest = byte ptr -800h .text:10004BC8 Format = dword ptr 8 .text:10004BC8 arg_4 = byte ptr 0Ch .text:10004BC8 .text:10004BC8 push ebp .text:10004BC9 mov ebp, esp .text:10004BCB sub esp, 818h .text:10004BD1 mov [ebp+lpWindowName], offset aDebugScreen1 ; "Debug Screen1" .text:10004BDB mov [ebp+lpClassName], offset aDebugwclass1 ; "debugWClass1" .text:10004BE5 lea eax, [ebp+arg_4] .text:10004BE8 mov [ebp+Args], eax .text:10004BEE mov ecx, [ebp+Args] .text:10004BF4 push ecx ; Args .text:10004BF5 mov edx, [ebp+Format] .text:10004BF8 push edx ; Format .text:10004BF9 lea eax, [ebp+Dest] .text:10004BFF push eax ; Dest .text:10004C00 call ds:vsprintf ; overflow
The corresponding IDL is below:
[ uuid(5d2b62aa-ee0a-4a95-91ae-b064fdb471fc), version(1.0) ] interface target_interface { /* opcode: 0x01, address: 0x00401260 */ void sub_401260 ( [in] handle_t arg_1, [in] long arg_2, [in] long arg_3, [in] long arg_4, [in][ref][size_is(arg_4)] char * arg_5, [out][ref] long * arg_6 ); }
CVSS V3 Severity and Metrics
Data provided by the National Vulnerability Database (NVD)
Base Score:
None
Impact Score:
Unknown
Exploitability Score:
Unknown
Attack Vector (AV):
Unknown
Attack Complexity (AC):
Unknown
Privileges Required (PR):
Unknown
User Interaction (UI):
Unknown
Scope (S):
Unknown
Confidentiality (C):
Unknown
Integrity (I):
Unknown
Availability (A):
Unknown
General Information
Vendors
- advantech
Products
- webaccess
Metasploit Modules
References
