Vulnerabilities > CVE-2018-7431 - Path Traversal vulnerability in Splunk

CVSS 6.5 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

LOW

Confidentiality impact

HIGH

Integrity impact

NONE

Availability impact

NONE

network

low complexity

splunk

CWE-22

nessus

NVD

Published: 2018-10-23

Updated: 2019-01-25

Summary

Directory traversal vulnerability in the Splunk Django App in Splunk Enterprise 6.0.x before 6.0.14, 6.1.x before 6.1.13, 6.2.x before 6.2.14, 6.3.x before 6.3.10, 6.4.x before 6.4.6, and 6.5.x before 6.5.3; and Splunk Light before 6.6.0 allows remote authenticated users to read arbitrary files via unspecified vectors.

Vulnerable Configurations

Part	Description	Count
Application	Splunk Splunk Splunk 6.2.0 Splunk Splunk 6.2.1 Splunk Splunk 6.2.2 Splunk Splunk 6.2.3 Splunk Splunk 6.2.4 Splunk Splunk 6.2.5 Splunk Splunk 6.2.6 Splunk Splunk 6.2.7 Splunk Splunk 6.2.8 Splunk Splunk 6.2.9 Splunk Splunk 6.2.10 Splunk Splunk 6.2.11 Splunk Splunk 6.3.0 Splunk Splunk 6.3.1 Splunk Splunk 6.3.2 Splunk Splunk 6.3.3 Splunk Splunk 6.3.4 Splunk Splunk 6.3.5 Splunk Splunk 6.4.0 Splunk Splunk 6.4.1 Splunk Splunk 6.4.2 Splunk Splunk 6.4.3 Splunk Splunk 6.4.4 Splunk Splunk 6.5.0 Splunk Splunk 6.5.1 Splunk Splunk 6.5.2 Splunk Splunk 6.5.3 Splunk Splunk 6.3.6 Splunk Splunk 6.3.7 Splunk Splunk 6.3.8 Splunk Splunk 6.3.9 Splunk Splunk 6.2.12 Splunk Splunk 6.2.13 Splunk Splunk 6.0.0 Splunk Splunk 6.0.1 Splunk Splunk 6.0.2 Splunk Splunk 6.0.3 Splunk Splunk 6.0.4 Splunk Splunk 6.0.5 Splunk Splunk 6.0.6 Splunk Splunk 6.0.7 Splunk Splunk 6.0.8 Splunk Splunk 6.0.9 Splunk Splunk 6.0.10 Splunk Splunk 6.0.11 Splunk Splunk 6.0.12 Splunk Splunk 6.0.13 Splunk Splunk 6.1.0 Splunk Splunk 6.1.1 Splunk Splunk 6.1.2 Splunk Splunk 6.1.3 Splunk Splunk 6.1.4 Splunk Splunk 6.1.5 Splunk Splunk 6.1.6 Splunk Splunk 6.1.7 Splunk Splunk 6.1.8 Splunk Splunk 6.1.9 Splunk Splunk 6.1.10 Splunk Splunk 6.1.11 Splunk Splunk 6.1.12 Splunk Splunk 6.4.5	87

Common Weakness Enumeration (CWE)

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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.

Nessus

NASL family	CGI abuses
NASL id	SPLUNK_MULTI_653.NASL
description	According to its self-reported version number, the version of Splunk running on the remote web server is Splunk Light prior to 6.6.0 or Splunk Enterprise 6.0.x prior to 6.0.14, 6.1.x prior to 6.1.13, 6.2.x prior to 6.2.14, 6.3.x prior to 6.3.11, 6.4.x prior to 6.4.8, or 6.5.x prior to 6.5.3. It is, therefore,affected by multiple vulnerabilities: - A cross-site scripting (XSS) vulnerability exists due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to click a specially crafted URL, to execute arbitrary script code in a user
last seen	2020-06-01
modified	2020-06-02
plugin id	121043
published	2019-01-09
reporter	This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
source	https://www.tenable.com/plugins/nessus/121043
title	Splunk Enterprise 6.0.x < 6.0.14 / 6.1.x < 6.1.13 / 6.2.x < 6.2.14 / 6.3.x < 6.3.11 / 6.4.x < 6.4.8 / 6.5.x < 6.5.3 or Splunk Light < 6.6.0 Multiple Vulnerabilities
code	# # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(121043); script_version("1.2"); script_cvs_date("Date: 2019/10/31 15:18:51"); script_cve_id( "CVE-2018-7427", "CVE-2018-7429", "CVE-2018-7431", "CVE-2018-7432" ); script_bugtraq_id(105730); script_name(english:"Splunk Enterprise 6.0.x < 6.0.14 / 6.1.x < 6.1.13 / 6.2.x < 6.2.14 / 6.3.x < 6.3.11 / 6.4.x < 6.4.8 / 6.5.x < 6.5.3 or Splunk Light < 6.6.0 Multiple Vulnerabilities"); script_summary(english:"Checks the version of Splunk."); script_set_attribute(attribute:"synopsis", value: "An application running on the remote web server is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "According to its self-reported version number, the version of Splunk running on the remote web server is Splunk Light prior to 6.6.0 or Splunk Enterprise 6.0.x prior to 6.0.14, 6.1.x prior to 6.1.13, 6.2.x prior to 6.2.14, 6.3.x prior to 6.3.11, 6.4.x prior to 6.4.8, or 6.5.x prior to 6.5.3. It is, therefore,affected by multiple vulnerabilities: - A cross-site scripting (XSS) vulnerability exists due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to click a specially crafted URL, to execute arbitrary script code in a user's browser session. (CVE-2018-7427) - A denial of service (DoS) vulnerability exists in the Splunk daemon due to improper validation of HTTP requests. An unauthenticated, remote attacker can exploit this, via a specially crafted HTTP request, to cause the application to stop responding. (CVE-2018-7432) - A directory traversal vulnerability exists in Splunk Django App due to improper validation of user-supplied input by the affected software. An authenticated, remote attacker can exploit this, by sending a URI that contains directory traversal characters, to disclose the contents of files located outside of the server's restricted path. (CVE-2018-7431) - A denial of service (DoS) vulnerability exists in the Splunk daemon due to improper handling of malformed HTTP requests. An unauthenticated, remote attacker can exploit this, via a specially crafted HTTP request, to cause the application to stop responding. (CVE-2018-7429)"); script_set_attribute(attribute:"see_also", value:"https://www.splunk.com/view/SP-CAAAP5T#announce1"); script_set_attribute(attribute:"solution", value: "Upgrade to Splunk Enterprise version 6.0.14 / 6.1.13 / 6.2.14 / 6.3.11 / 6.4.8 / 6.5.3 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-7427"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/09/28"); script_set_attribute(attribute:"patch_publication_date", value:"2018/09/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/09"); script_set_attribute(attribute:"plugin_type", value:"remote"); script_set_attribute(attribute:"cpe", value:"cpe:/a:splunk:splunk"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"CGI abuses"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("splunkd_detect.nasl", "splunk_web_detect.nasl"); script_require_keys("installed_sw/Splunk"); script_require_ports("Services/www", 8089, 8000); exit(0); } include("vcf.inc"); include("http.inc"); app = "Splunk"; port = get_http_port(default:8000, embedded:TRUE); app_info = vcf::get_app_info(app:app, port: port); if (app_info['License'] == "Enterprise") { constraints = [ { "min_version" : "6.5.0", "fixed_version" : "6.5.3" }, { "min_version" : "6.4.0", "fixed_version" : "6.4.8" }, { "min_version" : "6.3.0", "fixed_version" : "6.3.11" }, { "min_version" : "6.2.0", "fixed_version" : "6.2.14" }, { "min_version" : "6.1.0", "fixed_version" : "6.1.13" }, { "min_version" : "6.0.0", "fixed_version" : "6.0.14" } ]; } else if (app_info['License'] == "Light") constraints = [{ "fixed_version" : "6.6.0" }]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING, flags:{xss:TRUE});

References

https://www.splunk.com/view/SP-CAAAP5T