Vulnerabilities > CVE-2007-4646 - Code Injection vulnerability in Hexamail Server 3.0.0.001Lite

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
hexamail
CWE-94
critical
nessus
exploit available

Summary

Buffer overflow in the pop3 service in Hexamail Server 3.0.0.001 Lite allows remote attackers to cause a denial of service (daemon crash) and probably execute arbitrary code via a long USER command.

Vulnerable Configurations

Part Description Count
Application
Hexamail
1

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Exploit-Db

descriptionHexamail Server 3.0.0.001 (pop3) pre-auth Remote Overflow PoC. CVE-2007-4646. Dos exploit for windows platform
fileexploits/windows/dos/4344.php
idEDB-ID:4344
last seen2016-01-31
modified2007-08-30
platformwindows
port
published2007-08-30
reporterrgod
sourcehttps://www.exploit-db.com/download/4344/
titleHexamail Server 3.0.0.001 pop3 pre-auth Remote Overflow PoC
typedos

Nessus

  • NASL familyWindows
    NASL idHEXAMAIL_POP3_OVERFLOW.NASL
    descriptionThe version of Hexamail installed on the remote host is affected by a buffer overflow in its POP3 service component that can be exploited by an unauthenticated, remote attacker to crash the service or to execute arbitrary code on the affected host with LOCAL SYSTEM privileges.
    last seen2020-06-01
    modified2020-06-02
    plugin id26015
    published2007-09-11
    reporterThis script is Copyright (C) 2007-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/26015
    titleHexamail Server pop3 Service USER Command Remote Overflow
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(26015);
      script_version("1.13");
    
      script_cve_id("CVE-2007-4646");
      script_bugtraq_id(25496);
      script_xref(name:"EDB-ID", value:"4344");
    
      script_name(english:"Hexamail Server pop3 Service USER Command Remote Overflow");
      script_summary(english:"Tries to crash the POP3 server");
    
     script_set_attribute(attribute:"synopsis", value:
    "The remote POP3 server is affected by a buffer overflow vulnerability." );
     script_set_attribute(attribute:"description", value:
    "The version of Hexamail installed on the remote host is affected by a
    buffer overflow in its POP3 service component that can be exploited by
    an unauthenticated, remote attacker to crash the service or to execute
    arbitrary code on the affected host with LOCAL SYSTEM privileges." );
     # https://web.archive.org/web/20070918121703/http://retrogod.altervista.org/hexamail_bof.html
     script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?31225944");
     script_set_attribute(attribute:"solution", value:
    "Upgrade to Hexamail version 3.0.1.004 or later as that reportedly
    resolves the issue." );
     script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
     script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
     script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
     script_set_attribute(attribute:"exploit_available", value:"true");
     script_cwe_id(94);
     script_set_attribute(attribute:"plugin_publication_date", value: "2007/09/11");
     script_cvs_date("Date: 2018/07/12 19:01:17");
     script_set_attribute(attribute:"plugin_type", value:"remote");
     script_end_attributes();
    
      script_category(ACT_DENIAL);
      script_family(english:"Windows");
      script_copyright(english:"This script is Copyright (C) 2007-2018 Tenable Network Security, Inc.");
      script_dependencies("find_service1.nasl");
      script_require_ports("Services/pop3", 110);
    
      exit(0);
    }
    
    
    include("pop3_func.inc");
    
    
    port = get_kb_item("Services/pop3");
    if (!port) port = 110;
    if (!get_port_state(port)) exit(0);
    
    
    # Make sure the banner looks like Hexamail.
    banner = get_pop3_banner(port:port);
    if (!banner || "+OK POP3 server ready  <" >!< banner) exit(0);
    
    
    # Establish a connection.
    soc = open_sock_tcp(port);
    if (!soc) exit(0);
    
    s = recv_line(socket:soc, length:1024);
    if (!strlen(s) || s !~ '^\\+OK')
    {
      close(soc); 
      exit(0);
    }
    if ("Qpopper" >< s) exit(0);
    
    
    # Try to exploit the issue to crash the application.
    c = string("USER ./", crap(1024));
    send(socket:soc, data:string(c, "\r\n"));
    s = recv_line(socket:soc, length:1024);
    close(soc);
    
    
    # If we didn't get a response...
    if (!strlen(s))
    {
      # Try to reestablish a connection and read the banner.
      soc2 = open_sock_tcp(port);
      if (soc2) 
      {
        s2 = recv_line(socket:soc2, length:1024);
        close(soc2);
      }
      else s2 = NULL;
    
      # If we couldn't establish the connection or read the banner,
      # there's a problem.
      if (!soc2 || !strlen(s2))
      {
        security_hole(port);
        exit(0);
      }
    }
    
  • NASL familyWindows
    NASL idHEXAMAIL_POP3_OVERFLOW_CREDS.NASL
    descriptionAccording to its version, the installation of Hexamail on the remote host is affected by a buffer overflow in its POP3 service component that can be exploited by an unauthenticated, remote attacker to crash the service or to execute arbitrary code on the affected host with LOCAL SYSTEM privileges.
    last seen2020-06-01
    modified2020-06-02
    plugin id26016
    published2007-09-11
    reporterThis script is Copyright (C) 2007-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/26016
    titleHexamail Server pop3 Service USER Command Remote Overflow (credentialed check)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    
    
    include("compat.inc");
    
    if (description)
    {
      script_id(26016);
      script_version("1.15");
     script_cvs_date("Date: 2018/07/12 19:01:17");
    
      script_cve_id("CVE-2007-4646");
      script_bugtraq_id(25496);
      script_xref(name:"EDB-ID", value:"4344");
    
      script_name(english:"Hexamail Server pop3 Service USER Command Remote Overflow (credentialed check)");
      script_summary(english:"Checks version of hexamailserver.exe");
    
     script_set_attribute(attribute:"synopsis", value:
    "The remote Windows host has a program that is affected by a buffer
    overflow vulnerability.");
     script_set_attribute(attribute:"description", value:
    "According to its version, the installation of Hexamail on the remote
    host is affected by a buffer overflow in its POP3 service component
    that can be exploited by an unauthenticated, remote attacker to crash
    the service or to execute arbitrary code on the affected host with
    LOCAL SYSTEM privileges.");
     # https://web.archive.org/web/20070918121703/http://retrogod.altervista.org/hexamail_bof.html
     script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?31225944");
     script_set_attribute(attribute:"solution", value:
    "Upgrade to Hexamail version 3.0.1.004 or later as that reportedly
    resolves the issue.");
     script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
     script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
     script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
     script_set_attribute(attribute:"exploit_available", value:"true");
     script_cwe_id(94);
    
     script_set_attribute(attribute:"plugin_publication_date", value:"2007/09/11");
    
    script_set_attribute(attribute:"plugin_type", value:"local");
    script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Windows");
      script_copyright(english:"This script is Copyright (C) 2007-2018 Tenable Network Security, Inc.");
      script_dependencies("smb_hotfixes.nasl");
      script_require_keys("SMB/Registry/Enumerated");
      script_require_ports(139, 445);
    
      exit(0);
    }
    
    
    include("smb_func.inc");
    include("audit.inc");
    
    
    function display_dword (dword, nox)
    {
     local_var tmp;
    
     if (isnull(nox) || (nox == FALSE))
       tmp = "0x";
     else
       tmp = "";
    
     return string (tmp,
                   toupper(
                      hexstr(
                        raw_string(
                                   (dword >>> 24) & 0xFF,
                                   (dword >>> 16) & 0xFF,
                                   (dword >>> 8) & 0xFF,
                                   dword & 0xFF
                                  )
                            )
                          )
                   );
    }
    
    
    # Connect to the appropriate share.
    if (!get_kb_item("SMB/Registry/Enumerated")) exit(0);
    name    =  kb_smb_name();
    port    =  kb_smb_transport();
    
    login   =  kb_smb_login();
    pass    =  kb_smb_password();
    domain  =  kb_smb_domain();
    
    
    
    if(! smb_session_init()) audit(AUDIT_FN_FAIL, 'smb_session_init');
    rc = NetUseAdd(login:login, password:pass, domain:domain, share:"IPC$");
    if (rc != 1)
    {
      NetUseDel();
      exit(0);
    }
    
    
    # Connect to remote registry.
    hklm = RegConnectRegistry(hkey:HKEY_LOCAL_MACHINE);
    if (isnull(hklm))
    {
      NetUseDel();
      exit(0);
    }
    
    
    # Check whether it's installed.
    path = NULL;
    
    key = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Hexamail Server";
    key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
    if (!isnull(key_h))
    {
      value = RegQueryValue(handle:key_h, item:"InstallLocation");
      if (!isnull(value))
      {
        path = value[1];
      }
    
      RegCloseKey(handle:key_h);
    }
    RegCloseKey(handle:hklm);
    if (isnull(path))
    {
      NetUseDel();
      exit(0);
    }
    
    
    # Check the version of the main exe.
    share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:path);
    exe =  ereg_replace(pattern:"^[A-Za-z]:(.*)", replace:"\1\hexamailserver.exe", string:path);
    NetUseDel(close:FALSE);
    
    rc = NetUseAdd(login:login, password:pass, domain:domain, share:share);
    if (rc != 1)
    {
      NetUseDel();
      exit(0);
    }
    
    fh = CreateFile(
      file:exe,
      desired_access:GENERIC_READ,
      file_attributes:FILE_ATTRIBUTE_NORMAL,
      share_mode:FILE_SHARE_READ,
      create_disposition:OPEN_EXISTING
    );
    version = NULL;
    if (!isnull(fh))
    {
      ret = GetFileVersionEx(handle:fh);
      if (!isnull(ret)) children = ret['Children'];
      if (!isnull(children))
      {
        varfileinfo = children['VarFileInfo'];
        if (!isnull(varfileinfo))
        {
          translation =
            (get_word(blob:varfileinfo['Translation'], pos:0) << 16) +
            get_word(blob:varfileinfo['Translation'], pos:2);
          translation = toupper(display_dword(dword:translation, nox:TRUE));
        }
        stringfileinfo = children['StringFileInfo'];
        if (!isnull(stringfileinfo) && !isnull(translation))
        {
          data = stringfileinfo[translation];
          if (isnull(data)) data = stringfileinfo[tolower(translation)];
          if (!isnull(data)) version = data['ProductVersion'];
        }
      }
      CloseFile(handle:fh);
    }
    NetUseDel();
    
    
    # Check the version number.
    if (!isnull(version))
    {
      version = str_replace(find:",", replace:".", string:version);
    
      ver = split(version, sep:'.', keep:FALSE);
      for (i=0; i<max_index(ver); i++)
        ver[i] = int(ver[i]);
    
      fix = split("3.0.1.004", sep:'.', keep:FALSE);
      for (i=0; i<max_index(fix); i++)
        fix[i] = int(fix[i]);
    
      for (i=0; i<max_index(ver); i++)
        if ((ver[i] < fix[i]))
        {
          report = string(
            "Version ", version, " of Hexamail is installed under :\n",
            "\n",
            "  ", path
          );
          security_hole(port:port, extra:report);
          break;
        }
        else if (ver[i] > fix[i])
          break;
    }