好的,所以CreateProcessWithLogonW 函数过滤了用户令牌,LogonUser 也是如此。这似乎让我们陷入困境,因为我们没有正确的权限来纠正问题(见脚注)但事实证明,如果您使用 @987654327,LogonUser 确实不过滤令牌@ 而不是LOGON32_LOGON_INTERACTIVE。
这里有一些实际工作的代码。我们使用CreateProcessAsTokenW 函数来启动进程,因为这个特定的变体只需要SE_IMPERSONATE_NAME 权限,默认授予管理员帐户。
此示例程序启动一个子进程,该子进程在c:\windows\system32 中创建一个目录,如果子进程没有被提升,这是不可能的。
#define _WIN32_WINNT 0x0501
#include <Windows.h>
#include <Sddl.h>
#include <conio.h>
#include <stdio.h>
wchar_t command[] = L"c:\\windows\\system32\\cmd.exe /c md c:\\windows\\system32\\proof-that-i-am-an-admin";
int main(int argc, char **argv)
{
HANDLE usertoken;
STARTUPINFO sinfo;
PROCESS_INFORMATION pinfo;
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cb = sizeof(sinfo);
if (!LogonUser(L"username", L"domain", L"password", LOGON32_LOGON_BATCH, LOGON32_PROVIDER_DEFAULT, &usertoken))
{
printf("LogonUser: %u\n", GetLastError());
return 1;
}
if (!CreateProcessWithTokenW(usertoken, LOGON_WITH_PROFILE, L"c:\\windows\\system32\\cmd.exe", command, 0, NULL, NULL, &sinfo, &pinfo))
{
printf("CreateProcess: %u\n", GetLastError());
return 1;
}
return 0;
}
但是,如果目标进程是 GUI 进程(包括带有可见控制台的进程),它将无法正确显示。显然CreateProcessWithTokenW 只分配了进程运行所需的最低桌面和窗口站权限,这不足以实际显示 GUI。
即使您实际上不需要查看输出,也存在损坏的 GUI 会导致程序出现功能问题的风险。
因此,除非目标进程在后台运行,否则我们应该适当地分配权限。一般来说,最好新建一个窗口站和一个新桌面,隔离目标进程;但是,在这种情况下,目标进程无论如何都会以管理员身份运行,所以没有意义 - 我们只需更改现有窗口站和桌面的权限即可让生活更轻松。
2014 年 11 月 24 日编辑:更正了 Windows Station ACE 中的访问权限,以便它们适用于非管理用户。请注意,这样做可能会使相关的非管理员用户危及目标会话中的进程。
#define _WIN32_WINNT 0x0501
#include <Windows.h>
#include <AccCtrl.h>
#include <Aclapi.h>
#include <stdio.h>
wchar_t command[] = L"c:\\windows\\system32\\notepad.exe";
int main(int argc, char **argv)
{
HANDLE usertoken;
STARTUPINFO sinfo;
PROCESS_INFORMATION pinfo;
HDESK desktop;
EXPLICIT_ACCESS explicit_access;
BYTE buffer_token_user[SECURITY_MAX_SID_SIZE];
PTOKEN_USER token_user = (PTOKEN_USER)buffer_token_user;
PSECURITY_DESCRIPTOR existing_sd;
SECURITY_DESCRIPTOR new_sd;
PACL existing_dacl, new_dacl;
BOOL dacl_present, dacl_defaulted;
SECURITY_INFORMATION sec_info_dacl = DACL_SECURITY_INFORMATION;
DWORD dw, size;
HWINSTA window_station;
if (!LogonUser(L"username", L"domain", L"password", LOGON32_LOGON_BATCH, LOGON32_PROVIDER_DEFAULT, &usertoken))
{
printf("LogonUser: %u\n", GetLastError());
return 1;
}
if (!GetTokenInformation(usertoken, TokenUser, buffer_token_user, sizeof(buffer_token_user), &dw))
{
printf("GetTokenInformation(TokenUser): %u\n", GetLastError());
return 1;
}
window_station = GetProcessWindowStation();
if (window_station == NULL)
{
printf("GetProcessWindowStation: %u\n", GetLastError());
return 1;
}
if (!GetUserObjectSecurity(window_station, &sec_info_dacl, &dw, sizeof(dw), &size) && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
{
printf("GetUserObjectSecurity(window_station) call 1: %u\n", GetLastError());
return 1;
}
existing_sd = malloc(size);
if (existing_sd == NULL)
{
printf("malloc failed\n");
return 1;
}
if (!GetUserObjectSecurity(window_station, &sec_info_dacl, existing_sd, size, &dw))
{
printf("GetUserObjectSecurity(window_station) call 2: %u\n", GetLastError());
return 1;
}
if (!GetSecurityDescriptorDacl(existing_sd, &dacl_present, &existing_dacl, &dacl_defaulted))
{
printf("GetSecurityDescriptorDacl(window_station): %u\n", GetLastError());
return 1;
}
if (!dacl_present)
{
printf("no DACL present on window station\n");
return 1;
}
explicit_access.grfAccessMode = SET_ACCESS;
explicit_access.grfAccessPermissions = WINSTA_ALL_ACCESS | READ_CONTROL;
explicit_access.grfInheritance = NO_INHERITANCE;
explicit_access.Trustee.pMultipleTrustee = NULL;
explicit_access.Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
explicit_access.Trustee.TrusteeForm = TRUSTEE_IS_SID;
explicit_access.Trustee.TrusteeType = TRUSTEE_IS_USER;
explicit_access.Trustee.ptstrName = (LPTSTR)token_user->User.Sid;
dw = SetEntriesInAcl(1, &explicit_access, existing_dacl, &new_dacl);
if (dw != ERROR_SUCCESS) {
printf("SetEntriesInAcl(window_station): %u\n", dw);
return 1;
}
if (!InitializeSecurityDescriptor(&new_sd, SECURITY_DESCRIPTOR_REVISION))
{
printf("InitializeSecurityDescriptor(window_station): %u\n", GetLastError());
return 1;
}
if (!SetSecurityDescriptorDacl(&new_sd, TRUE, new_dacl, FALSE))
{
printf("SetSecurityDescriptorDacl(window_station): %u\n", GetLastError());
return 1;
}
if (!SetUserObjectSecurity(window_station, &sec_info_dacl, &new_sd))
{
printf("SetUserObjectSecurity(window_station): %u\n", GetLastError());
return 1;
}
free(existing_sd);
LocalFree(new_dacl);
desktop = GetThreadDesktop(GetCurrentThreadId());
if (desktop == NULL)
{
printf("GetThreadDesktop: %u\n", GetLastError());
return 1;
}
if (!GetUserObjectSecurity(desktop, &sec_info_dacl, &dw, sizeof(dw), &size) && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
{
printf("GetUserObjectSecurity(desktop) call 1: %u\n", GetLastError());
return 1;
}
existing_sd = malloc(size);
if (existing_sd == NULL)
{
printf("malloc failed\n");
return 1;
}
if (!GetUserObjectSecurity(desktop, &sec_info_dacl, existing_sd, size, &dw))
{
printf("GetUserObjectSecurity(desktop) call 2: %u\n", GetLastError());
return 1;
}
if (!GetUserObjectSecurity(desktop, &sec_info_dacl, existing_sd, 4096, &dw))
{
printf("GetUserObjectSecurity: %u\n", GetLastError());
return 1;
}
if (!GetSecurityDescriptorDacl(existing_sd, &dacl_present, &existing_dacl, &dacl_defaulted))
{
printf("GetSecurityDescriptorDacl: %u\n", GetLastError());
return 1;
}
if (!dacl_present)
{
printf("no DACL present\n");
return 1;
}
explicit_access.grfAccessMode = SET_ACCESS;
explicit_access.grfAccessPermissions = GENERIC_ALL;
explicit_access.grfInheritance = NO_INHERITANCE;
explicit_access.Trustee.pMultipleTrustee = NULL;
explicit_access.Trustee.MultipleTrusteeOperation = NO_MULTIPLE_TRUSTEE;
explicit_access.Trustee.TrusteeForm = TRUSTEE_IS_SID;
explicit_access.Trustee.TrusteeType = TRUSTEE_IS_USER;
explicit_access.Trustee.ptstrName = (LPTSTR)token_user->User.Sid;
dw = SetEntriesInAcl(1, &explicit_access, existing_dacl, &new_dacl);
if (dw != ERROR_SUCCESS) {
printf("SetEntriesInAcl: %u\n", dw);
return 1;
}
if (!InitializeSecurityDescriptor(&new_sd, SECURITY_DESCRIPTOR_REVISION))
{
printf("InitializeSecurityDescriptor: %u\n", GetLastError());
return 1;
}
if (!SetSecurityDescriptorDacl(&new_sd, TRUE, new_dacl, FALSE))
{
printf("SetSecurityDescriptorDacl: %u\n", GetLastError());
return 1;
}
if (!SetUserObjectSecurity(desktop, &sec_info_dacl, &new_sd))
{
printf("SetUserObjectSecurity(window_station): %u\n", GetLastError());
return 1;
}
free(existing_sd);
LocalFree(new_dacl);
ZeroMemory(&sinfo, sizeof(sinfo));
sinfo.cb = sizeof(sinfo);
if (!CreateProcessWithTokenW(usertoken, LOGON_WITH_PROFILE, L"c:\\windows\\system32\\notepad.exe", command, 0, NULL, NULL, &sinfo, &pinfo))
{
printf("CreateProcess: %u\n", GetLastError());
return 1;
}
return 0;
}
注意 LOGON_WITH_PROFILE 的使用。这不是显示 GUI 所必需的,并且它会大大减慢启动进程的速度,因此如果您不需要它,请将其删除 - 但如果您是管理员,则最可能的原因是您以不同的管理员身份启动进程是您需要该管理员的用户配置文件中的某些内容。 (另一种情况可能是您需要使用特定的域帐户才能访问另一台机器上的资源。)
脚注:
具体来说,您需要SeTcbPrivilege 才能使用GetTokenInformation 和TokenLinkedToken 来获取LogonUser 生成的提升令牌的可用句柄。不幸的是,此权限通常仅在您作为本地系统运行时才可用。
如果您没有SeTcbPrivilege,您仍然可以获得链接令牌的副本,但在这种情况下,它是SecurityIdentification 级别的模拟令牌,因此在创建新进程时没有用。感谢 RbMm 帮助我澄清这一点。