Vulnerabilities > CVE-2015-8357 - Path Traversal vulnerability in Bitrix Xscan 1.0.3

047910
CVSS 6.5 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
bitrix
CWE-22
nessus
exploit available
NVD
Published: 2015-12-16
Updated: 2018-10-09

Summary

Directory traversal vulnerability in the bitrix.xscan module before 1.0.4 for Bitrix allows remote authenticated users to rename arbitrary files, and consequently obtain sensitive information or cause a denial of service, via a .. (dot dot) in the file parameter to admin/bitrix.xscan_worker.php.

Vulnerable Configurations

Part Description Count
Application
Bitrix
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

descriptionBitrix bitrix.xscan Module 1.0.3 - Directory Traversal. CVE-2015-8357. Webapps exploit for php platform
fileexploits/php/webapps/38976.txt
idEDB-ID:38976
last seen2016-02-04
modified2015-12-14
platformphp
port80
published2015-12-14
reporterHigh-Tech Bridge SA
sourcehttps://www.exploit-db.com/download/38976/
titleBitrix bitrix.xscan Module 1.0.3 - Directory Traversal
typewebapps

Nessus

NASL familyCGI abuses
NASL idBITRIX_XSCAN_1_0_4_MODULE.NASL
descriptionThe version of the Bitrix bitrix.xscan module running on the remote web server is prior to 1.0.4. It is, therefore, affected by a path traversal vulnerability due to a failure to properly sanitize user-supplied input to the
last seen2020-06-01
modified2020-06-02
plugin id99932
published2017-05-02
reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/99932
titleBitrix bitrix.xscan Module < 1.0.4 bitrix.xscan_worker.php 'file' Parameter Path Traversal File Disclosure
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(99932);
  script_version("1.4");
  script_cvs_date("Date: 2018/06/14 12:21:47");

  script_cve_id("CVE-2015-8357");
  script_bugtraq_id(79776);
  script_xref(name:"EDB-ID", value:"38976");
  script_xref(name:"IAVA", value:"2017-A-0129");

  script_name(english:"Bitrix bitrix.xscan Module < 1.0.4 bitrix.xscan_worker.php 'file' Parameter Path Traversal File Disclosure");
  script_summary(english:"Checks the version of bitrix.xscan module.");

  script_set_attribute(attribute:"synopsis", value:
"A PHP application running on the remote web server contains a module
that is affected by a path traversal vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of the Bitrix bitrix.xscan module running on the remote
web server is prior to 1.0.4. It is, therefore, affected by a path
traversal vulnerability due to a failure to properly sanitize
user-supplied input to the 'file' parameter passed to the
/bitrix/admin/bitrix.xscan_worker.php script. An authenticated, remote
attacker can exploit this, via a specially crafted HTTP GET request,
to rename arbitrary files and read the content of arbitrary files on
the host.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported module version number.");
  script_set_attribute(attribute:"see_also", value:"https://www.htbridge.com/advisory/HTB23278");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Bitrix bitrix.xscan module version 1.0.4 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:U/RC:ND");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:U/RC:X");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/11/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/11/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/02");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/a:bitrix:bitrix");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:bitrix:xscan");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");

  script_dependencies("bitrix_detect.nbin");
  script_require_keys("www/PHP", "installed_sw/Bitrix");
  script_require_ports("Services/www", 443);

  exit(0);
}

include("vcf.inc");
include("http.inc");

app = "bitrix.xscan for Bitrix";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:443, php:TRUE);

app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);
vcf::check_granularity(app_info:app_info, sig_segments:2);
constraints = [{"fixed_version" : "1.0.4"}];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/134765/bitrixsxcan-traversal.txt
idPACKETSTORM:134765
last seen2016-12-05
published2015-12-11
reporterHigh-Tech Bridge SA
sourcehttps://packetstormsecurity.com/files/134765/bitrix.scan-Bitrix-1.0.3-Path-Traversal.html
titlebitrix.scan Bitrix 1.0.3 Path Traversal

References