Vulnerabilities > CVE-2019-3396 - Path Traversal vulnerability in Atlassian Confluence

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
atlassian
CWE-22
critical
nessus
exploit available
metasploit
NVD
Published: 2019-03-25
Updated: 2021-12-13

Summary

The Widget Connector macro in Atlassian Confluence Server before version 6.6.12 (the fixed version for 6.6.x), from version 6.7.0 before 6.12.3 (the fixed version for 6.12.x), from version 6.13.0 before 6.13.3 (the fixed version for 6.13.x), and from version 6.14.0 before 6.14.2 (the fixed version for 6.14.x), allows remote attackers to achieve path traversal and remote code execution on a Confluence Server or Data Center instance via server-side template injection.

Vulnerable Configurations

Part Description Count
Application
Atlassian
310

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.

D2sec

nameConfluence File Disclosure
urlhttp://www.d2sec.com/exploits/confluence_file_disclosure.html

Exploit-Db

fileexploits/multiple/remote/46731.rb
idEDB-ID:46731
last seen2019-04-19
modified2019-04-19
platformmultiple
port
published2019-04-19
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/46731
titleAtlassian Confluence Widget Connector Macro - Velocity Template Injection (Metasploit)
typeremote

Metasploit

descriptionWidget Connector Macro is part of Atlassian Confluence Server and Data Center that allows embed online videos, slideshows, photostreams and more directly into page. A _template parameter can be used to inject remote Java code into a Velocity template, and gain code execution. Authentication is unrequired to exploit this vulnerability. By default, Java payload will be used because it is cross-platform, but you can also specify which native payload you want (Linux or Windows). Confluence before version 6.6.12, from version 6.7.0 before 6.12.3, from version 6.13.0 before 6.13.3 and from version 6.14.0 before 6.14.2 are affected. This vulnerability was originally discovered by Daniil Dmitriev https://twitter.com/ddv_ua.
idMSF:EXPLOIT/MULTI/HTTP/CONFLUENCE_WIDGET_CONNECTOR
last seen2020-06-12
modified2019-06-25
published2019-04-11
references
reporterRapid7
sourcehttps://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/multi/http/confluence_widget_connector.rb
titleAtlassian Confluence Widget Connector Macro Velocity Template Injection

Nessus

  • NASL familyCGI abuses
    NASL idCONFLUENCE_6_6_12.NASL
    descriptionAccording to its self-reported version number, the Atlassian Confluence application running on the remote host is prior to 6.6.12, 6.7.x prior to 6.12.3, 6.13.x prior to 6.13.3, or 6.14.x prior to 6.14.2. It is, therefore, affected by the following vulnerabilities : - A server-side request forgery (SSRF) exists in the WebDAV plugin due to improper input validation. An attacker can exploit this, via unspecified vectors, to send arbitrary HTTP and WebDAV requests from the application. (CVE-2019-3395) - A server-side template injection exists in the Widget Connector due to improper input validation. An attacker can exploit this, via unspecified vectors, to traverse directories or execute arbitrary code. (CVE-2019-3396) Note that Nessus has not tested for this issue but has instead relied only on the application
    last seen2020-05-03
    modified2019-03-22
    plugin id123008
    published2019-03-22
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123008
    titleAtlassian Confluence < 6.6.12 / 6.7.x < 6.12.3 / 6.13.x < 6.13.3 / 6.14.x < 6.14.2 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(123008);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/01");

  script_cve_id("CVE-2019-3395", "CVE-2019-3396");
  script_bugtraq_id(107543);
  script_xref(name:"IAVA", value:"2019-A-0135-S");

  script_name(english:"Atlassian Confluence < 6.6.12 / 6.7.x < 6.12.3 / 6.13.x < 6.13.3 / 6.14.x < 6.14.2 Multiple Vulnerabilities");
  script_summary(english:"Checks the Atlassian Confluence version.");

  script_set_attribute(attribute:"synopsis", value:
"A web application running on the remote host is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Atlassian
Confluence application running on the remote host is prior to 6.6.12,
6.7.x prior to 6.12.3, 6.13.x prior to 6.13.3, or 6.14.x prior to
6.14.2. It is, therefore, affected by the following vulnerabilities :

  - A server-side request forgery (SSRF) exists in the
    WebDAV plugin due to improper input validation. An
    attacker can exploit this, via unspecified vectors, to
    send arbitrary HTTP and WebDAV requests from the
    application. (CVE-2019-3395)

  - A server-side template injection exists in the Widget
    Connector due to improper input validation. An attacker
    can exploit this, via unspecified vectors, to traverse
    directories or execute arbitrary code. (CVE-2019-3396)

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.");
  # https://confluence.atlassian.com/doc/confluence-security-advisory-2019-03-20-966660264.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b8e8304c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Confluence version 6.6.12, 6.12.3, 6.13.3,
6.14.2, 6.15.1 or later.");
  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:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3396");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"d2_elliot_name", value:"Confluence File Disclosure");
  script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Atlassian Confluence Widget Connector Macro Velocity Template Injection');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/22");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:atlassian:confluence");
  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) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("confluence_detect.nasl");
  script_require_keys("installed_sw/confluence", "Settings/ParanoidReport");
  script_require_ports("Services/www", 8080, 8090);

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

app_name = "confluence";

port = get_http_port(default:80);

app_info = vcf::get_app_info(app:app_name, port:port, webapp:true);
vcf::check_granularity(app_info:app_info, sig_segments:3);

constraints = [
  {                         "fixed_version": "6.6.12" },
  {"min_version": "6.7.0",  "fixed_version": "6.12.3", "fixed_display": "6.12.3 / 6.15.1"},
  {"min_version": "6.13.0", "fixed_version": "6.13.3", "fixed_display": "6.13.3 / 6.15.1" },
  {"min_version": "6.14.0", "fixed_version": "6.14.2", "fixed_display": "6.14.2 / 6.15.1" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
  • NASL familyCGI abuses
    NASL idCONFLUENCE_CVE-2019-3396.NASL
    descriptionAccording to the tests performed by Nessus, the remote host is affected by the following vulnerability: - A server-side template injection exists in the Widget Connector due to improper input validation. An attacker can exploit this, via unspecified vectors, to traverse directories or execute arbitrary code. (CVE-2019-3396)
    last seen2020-05-03
    modified2019-04-11
    plugin id124004
    published2019-04-11
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124004
    titleAtlassian Confluence < 6.6.12 / 6.7.x < 6.12.3 / 6.13.x < 6.13.3 / 6.14.x < 6.14.2 Template Injection
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(124004);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/01");

  script_cve_id("CVE-2019-3396");
  script_xref(name:"IAVA", value:"2019-A-0135-S");

  script_name(english:"Atlassian Confluence < 6.6.12 / 6.7.x < 6.12.3 / 6.13.x < 6.13.3 / 6.14.x < 6.14.2 Template Injection");
  script_summary(english:"Checks the Atlassian Confluence instance for a template injection.");

  script_set_attribute(attribute:"synopsis", value:
"A web application running on the remote host is affected by
a template injection vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to the tests performed by Nessus, the remote host
is affected by the following vulnerability:

  - A server-side template injection exists in the Widget
    Connector due to improper input validation. An attacker
    can exploit this, via unspecified vectors, to traverse
    directories or execute arbitrary code. (CVE-2019-3396)");
  # https://confluence.atlassian.com/doc/confluence-security-advisory-2019-03-20-966660264.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b8e8304c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Atlassian Confluence version 6.6.12, 6.12.3, 6.13.3,
6.14.2, 6.15.1 or later.");
  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:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-3396");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"d2_elliot_name", value:"Confluence File Disclosure");
  script_set_attribute(attribute:"exploit_framework_d2_elliot", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Atlassian Confluence Widget Connector Macro Velocity Template Injection');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/11");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:atlassian:confluence");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("confluence_detect.nasl");
  script_require_keys("installed_sw/confluence");
  script_require_ports("Services/www", 8080, 8090);

  exit(0);
}

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

app_name = 'confluence';

port = get_http_port(default:8090);

app_info = vcf::get_app_info(app:app_name, port:port, webapp:true);
path = app_info['path'];
if(path[strlen(path)-1] != '/') path += '/';

item   =  path + 'rest/tinymce/1/macro/preview';
header = {'Content-Type':'application/json','User-Agent':''};
data   = '{"contentId":"1337","macro":{"name":"widget","body":"","params":' +
         '{"url":"http://localhost//www.youtube.com/watch?v=w0gtNxBWIEY","width":"1000","height":"1000","_template":"../web.xml"}}}';

res = http_send_recv3(method:'POST', item:item, port:port, add_headers:header, data:data, exit_on_fail:TRUE);

if('</web-app>' >< res[2])
  security_report_v4(severity:SECURITY_HOLE, port:port, generic:TRUE, request:[http_last_sent_request()]);
else
  audit(AUDIT_WEB_APP_NOT_AFFECTED, 'Atlassian Confluence', build_url(qs:path, port:port));

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/152568/confluence_widget_connector.rb.txt
idPACKETSTORM:152568
last seen2019-04-19
published2019-04-18
reporterDmitry Shchannikov
sourcehttps://packetstormsecurity.com/files/152568/Atlassian-Confluence-Widget-Connector-Macro-Velocity-Template-Injection.html
titleAtlassian Confluence Widget Connector Macro Velocity Template Injection

References