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Updated to use FFI/_wexecve() on windows

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This commit is contained in:
Bryan Roe 2021-01-16 02:00:40 -08:00
parent de2905ffcb
commit 060a34363f
2 changed files with 58 additions and 4 deletions
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31
agents/meshcore.js
View File

@ -4306,6 +4306,34 @@ function createMeshCore(agent)
require('MeshAgent').SendCommand({ action: 'sessions', type: 'msg', value: sendAgentMessage.messages }); require('MeshAgent').SendCommand({ action: 'sessions', type: 'msg', value: sendAgentMessage.messages });
} }
function windows_execve(name, agentfilename, sessionid)
{
var libc;
try
{
libc = require('_GenericMarshal').CreateNativeProxy('msvcrt.dll');
libc.CreateMethod('_wexecve');
}
catch (xx)
{
sendConsoleText('Self Update failed because msvcrt.dll is missing', sessionid);
sendAgentMessage('Self Update failed because msvcrt.dll is missing', 3);
return;
}
var name = 'Mesh Agent';
var agentfilename = 'MeshAgent.exe';
var cmd = require('_GenericMarshal').CreateVariable(process.env['windir'] + '\\system32\\cmd.exe', { wide: true });
var args = require('_GenericMarshal').CreateVariable(3 * require('_GenericMarshal').PointerSize);
var arg1 = require('_GenericMarshal').CreateVariable('cmd.exe', { wide: true });
var arg2 = require('_GenericMarshal').CreateVariable('/C wmic service "' + name + '" call stopservice & copy "' + process.cwd() + agentfilename + '.update" "' + process.execPath + '" & wmic service "' + name + '" call startservice & erase "' + process.cwd() + agentfilename + '.update"', { wide: true });
arg1.pointerBuffer().copy(args.toBuffer());
arg2.pointerBuffer().copy(args.toBuffer(), require('_GenericMarshal').PointerSize);
libc._wexecve(cmd, args, 0);
}
// Start a JavaScript based Agent Self-Update // Start a JavaScript based Agent Self-Update
function agentUpdate_Start(updateurl, updateoptions) function agentUpdate_Start(updateurl, updateoptions)
{ {
@ -4407,8 +4435,7 @@ function createMeshCore(agent)
if (process.platform == 'win32') if (process.platform == 'win32')
{ {
// Use _wexecve() equivalent to perform the update // Use _wexecve() equivalent to perform the update
this.child = require('child_process').execFile(process.env['windir'] + '\\system32\\cmd.exe', windows_execve(name, agentfilename, sessionid);
['/C wmic service "' + name + '" call stopservice && copy "' + process.cwd() + agentfilename + '.update" "' + process.execPath + '" && wmic service "' + name + '" call startservice && erase "' + process.cwd() + agentfilename + '.update"'], { type: 4 | 0x8000 });
} }
else else
{ {

31
agents/recoverycore.js
View File

@ -49,6 +49,34 @@ function sendAgentMessage(msg, icon)
require('MeshAgent').SendCommand({ action: 'sessions', type: 'msg', value: sendAgentMessage.messages }); require('MeshAgent').SendCommand({ action: 'sessions', type: 'msg', value: sendAgentMessage.messages });
} }
function windows_execve(name, agentfilename, sessionid)
{
var libc;
try
{
libc = require('_GenericMarshal').CreateNativeProxy('msvcrt.dll');
libc.CreateMethod('_wexecve');
}
catch (xx)
{
sendConsoleText('Self Update failed because msvcrt.dll is missing', sessionid);
sendAgentMessage('Self Update failed because msvcrt.dll is missing', 3);
return;
}
var name = 'Mesh Agent';
var agentfilename = 'MeshAgent.exe';
var cmd = require('_GenericMarshal').CreateVariable(process.env['windir'] + '\\system32\\cmd.exe', { wide: true });
var args = require('_GenericMarshal').CreateVariable(3 * require('_GenericMarshal').PointerSize);
var arg1 = require('_GenericMarshal').CreateVariable('cmd.exe', { wide: true });
var arg2 = require('_GenericMarshal').CreateVariable('/C wmic service "' + name + '" call stopservice & copy "' + process.cwd() + agentfilename + '.update" "' + process.execPath + '" & wmic service "' + name + '" call startservice & erase "' + process.cwd() + agentfilename + '.update"', { wide: true });
arg1.pointerBuffer().copy(args.toBuffer());
arg2.pointerBuffer().copy(args.toBuffer(), require('_GenericMarshal').PointerSize);
libc._wexecve(cmd, args, 0);
}
// Start a JavaScript based Agent Self-Update // Start a JavaScript based Agent Self-Update
function agentUpdate_Start(updateurl, updateoptions) function agentUpdate_Start(updateurl, updateoptions)
{ {
@ -150,8 +178,7 @@ function agentUpdate_Start(updateurl, updateoptions)
if (process.platform == 'win32') if (process.platform == 'win32')
{ {
// Use _wexecve() equivalent to perform the update // Use _wexecve() equivalent to perform the update
this.child = require('child_process').execFile(process.env['windir'] + '\\system32\\cmd.exe', windows_execve(name, agentfilename, sessionid);
['/C wmic service "' + name + '" call stopservice && copy "' + process.cwd() + agentfilename + '.update" "' + process.execPath + '" && wmic service "' + name + '" call startservice && erase "' + process.cwd() + agentfilename + '.update"'], { type: 4 | 0x8000 });
} }
else else
{ {