def omi_vulnerability_patch_validation():
    """
    Return: True is OMI Vulnerability patch is installed. Otherwise false.
    """
    print_notice("Validating that the OMI vulnerability patch is installed.")
    try:
        OMI_version = subprocess.Popen(["dpkg", "-l"], stdout=subprocess.PIPE)
    except Exception:
        OMI_version = subprocess.Popen(["rpm", "-qa"], stdout=subprocess.PIPE)
    grep = subprocess.Popen(["grep", "omsagent"], stdin=OMI_version.stdout, stdout=subprocess.PIPE)
    o, e = grep.communicate()
    if e is not None:
        print_error("Error: Could not validate omsagent version.")
        return False
    else:
        content = o.decode(encoding='UTF-8')
        agent_version = re.search("\\d+.\\d+.\\d+", content).group()
        if agent_version is None:
            print_error("Error: Could not validate omsagent version.")
            return False
        agent_subversion_list = agent_version.split('.')
        installed_version_major, installed_version_minor, installed_version_patch = int(agent_subversion_list[0]), int(
            agent_subversion_list[1]), int(agent_subversion_list[2])
        if is_agent_version_with_patch(installed_version_major, installed_version_minor, installed_version_patch):
            print_ok("Protected from OMI vulnerability, patch is installed.")
            return True
        print_error(
            "The patch installation is missing and the OMI vulnerability still exists. Please re-install the agent completely.")
        return False

    Return: True is OMI Vulnerability patch is installed. Otherwise false.
    
DataConnectors/CEF/cef_troubleshoot.py