Vulnerabilities > CVE-2017-2601 - Cross-site Scripting vulnerability in Jenkins

047910
CVSS 5.4 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
LOW
Integrity impact
LOW
Availability impact
NONE
network
low complexity
jenkins
CWE-79
nessus
NVD
Published: 2018-05-10
Updated: 2022-10-19

Summary

Jenkins before versions 2.44, 2.32.2 is vulnerable to a persisted cross-site scripting in parameter names and descriptions (SECURITY-353). Users with the permission to configure jobs were able to inject JavaScript into parameter names and descriptions.

Vulnerable Configurations

Part Description Count
Application
Jenkins
1511

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Embedding Scripts in Non-Script Elements
    This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Cross-Site Scripting in Error Pages
    An attacker distributes a link (or possibly some other query structure) with a request to a third party web server that is malformed and also contains a block of exploit code in order to have the exploit become live code in the resulting error page. When the third party web server receives the crafted request and notes the error it then creates an error message that echoes the malformed message, including the exploit. Doing this converts the exploit portion of the message into to valid language elements that are executed by the viewing browser. When a victim executes the query provided by the attacker the infected error message error message is returned including the exploit code which then runs in the victim's browser. XSS can result in execution of code as well as data leakage (e.g. session cookies can be sent to the attacker). This type of attack is especially dangerous since the exploit appears to come from the third party web server, who the victim may trust and hence be more vulnerable to deception.
  • Cross-Site Scripting Using Alternate Syntax
    The attacker uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.

Nessus

  • NASL familyCGI abuses
    NASL idJENKINS_SECURITY_ADVISORY_2017-02-01.NASL
    descriptionThe remote web server hosts a version of Jenkins that is prior to 2.44, or a version of Jenkins LTS prior to 2.32.2, or else a version of Jenkings Opertations Center that is 1.625.x.y prior to 1.625.22.1, 2.7.x.0.y prior to 2.7.22.0.1, or 2.x.y.x prior to 2.32.2.1, or else a version of Jenkins Enterprise that is 1.651.x.y prior to 1.651.22.1, 2.7.x.0.y prior to 2.7.22.0.1, or 2.x.y.z prior to 2.32.2.1. It is, therefore, affected by the following vulnerabilities : - A DOM-based cross-site scripting (XSS) vulnerability exists in jQuery Core due to improper validation of certain tags while being rendered using innerHTML. An unauthenticated, remote attacker can exploit this, via a specially crafted request, to execute arbitrary script code in the user
    last seen2020-06-01
    modified2020-06-02
    plugin id97609
    published2017-03-08
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/97609
    titleJenkins < 2.44 / 2.32.x < 2.32.2, Jenkins Operations Center < 1.625.22.1 / 2.7.22.0.1 / 2.32.2.1, and Jenkins Enterprise < 1.651.22.1 / 2.7.22.0.1 / 2.32.2.1 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(97609);
  script_version("1.11");
  script_cvs_date("Date: 2019/06/10 11:30:32");

  script_cve_id(
    "CVE-2011-4969",
    "CVE-2015-0886",
    "CVE-2016-9887",
    "CVE-2017-2598",
    "CVE-2017-2599",
    "CVE-2017-2600",
    "CVE-2017-2601",
    "CVE-2017-2602",
    "CVE-2017-2603",
    "CVE-2017-2604",
    "CVE-2017-2605",
    "CVE-2017-2606",
    "CVE-2017-2607",
    "CVE-2017-2608",
    "CVE-2017-2609",
    "CVE-2017-2610",
    "CVE-2017-2611",
    "CVE-2017-2612",
    "CVE-2017-2613",
    "CVE-2017-1000362"
  );
  script_bugtraq_id(
    58458,
    95948,
    95949,
    95951,
    95952,
    95953,
    95954,
    95955,
    95956,
    95957,
    95959,
    95960,
    95961,
    95962,
    95963,
    95964,
    95967
  );

  script_name(english:"Jenkins < 2.44 / 2.32.x < 2.32.2, Jenkins Operations Center < 1.625.22.1 / 2.7.22.0.1 / 2.32.2.1, and Jenkins Enterprise < 1.651.22.1 / 2.7.22.0.1 / 2.32.2.1 Multiple Vulnerabilities");
  script_summary(english:"Checks the Jenkins version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server hosts a job scheduling and management system
that is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote web server hosts a version of Jenkins that is prior to
2.44, or a version of Jenkins LTS prior to 2.32.2, or else a version
of Jenkings Opertations Center that is 1.625.x.y prior to 1.625.22.1,
2.7.x.0.y prior to 2.7.22.0.1, or 2.x.y.x prior to 2.32.2.1, or else a
version of Jenkins Enterprise that is 1.651.x.y prior to 1.651.22.1,
2.7.x.0.y prior to 2.7.22.0.1, or 2.x.y.z prior to 2.32.2.1. It is,
therefore, affected by the following vulnerabilities :

  - A DOM-based cross-site scripting (XSS) vulnerability
    exists in jQuery Core due to improper validation of
    certain tags while being rendered using innerHTML. An
    unauthenticated, remote attacker can exploit this, via
    a specially crafted request, to execute arbitrary script
    code in the user's browser session. (CVE-2011-4969)

  - An integer overflow condition exists in jBCrypt in the
    key stretching implementation in gensalt, within the
    crypt_raw() function, which is triggered when the
    'log_rounds' parameter is set to the maximum value (31).
    An unauthenticated, remote attacker can exploit this to
    cause log_rounds to perform zero rounds, allowing a
    brute-force attack to more easily determine the password
    hash. (CVE-2015-0886)

  - A cross-site request forgery vulnerability (XSRF) exists
    due to several URLs related to group and role management
    not requiring POST form submission. An unauthenticated,
    remote attacker can exploit this to create unused roles,
    delete unused roles, and set group descriptions. Note
    that only Jenkins Enterprise is affected by this issue.
    (CVE-2016-9887)

  - A flaw exists when sensitive data, such as passwords, is
    encrypted using AES-128 with electronic codebook mode
    (ECB). An authenticated, remote attacker can exploit
    this to disclose information about reused passwords.
    (CVE-2017-2598)

  - An unspecified flaw exists that is triggered when
    handling new items due to insufficient permission
    checks. An authenticated, remote attacker can exploit
    this, by using the name of an already existing item, to
    create a new item that overwrites the existing item or
    to gain access to related objects. (CVE-2017-2599)

  - An information disclosure vulnerability exists due to
    improper permissions being set for accessing node
    monitor data via the remote API. An authenticated,
    remote attacker can exploit this to disclose system
    configuration and runtime information. (CVE-2017-2600)

  - A stored cross-site scripting (XSS) vulnerability exists
    due to improper validation of input to names and
    descriptions fields before returning it to users. An
    authenticated, remote attacker can exploit this, via a
    specially crafted request, to execute arbitrary script
    code in a user's browser session. (CVE-2017-2601)

  - A flaw exists in the Agent-to-Master Security Subsystem
    because build metadata from the Pipeline suite is not
    properly blacklisted. An authenticated, remote attacker
    can exploit this to overwrite metadata files.
    (CVE-2017-2602)

  - A flaw exists in the config.xml API when handling
    user-initiated agent disconnects, which results in User
    objects being included in the agent API output. An
    authenticated, remote attacker can exploit this to
    disclose sensitive information (e.g., user API tokens).
    (CVE-2017-2603)

  - A flaw exists when handling permissions for
    administrative monitors that allows an authenticated,
    remote attacker to access certain provided actions.
    (CVE-2017-2604)

  - A flaw exists in the Re-Key Admin Monitor when
    re-encrypting secrets with a new key that results in old
    secrets, including the encryption key, being stored
    with world-readable permissions. A local attacker can
    exploit this to disclose sensitive information from the
    backup files. (CVE-2017-2605)

  - A flaw exists in the internal API, specifically within
    the Jenkins::getItems() function, when requesting a list
    of items via UnprotectedRootAction. An authenticated,
    remote attacker can exploit this to disclose information
    regarding otherwise restricted items. (CVE-2017-2606)

  - A stored cross-site scripting (XSS) vulnerability exists
    due to improper validation of input passed via
    serialized console notes before returning it to users in
    build logs. An authenticated, remote attacker can
    exploit this, via a specially crafted request, to
    execute arbitrary script code in a user's browser
    session. (CVE-2017-2607)

  - A flaw exists in the XStream-based API due to improper
    validation of user-supplied input before it is
    deserialized. An authenticated, remote attacker can
    exploit this, via a specially crafted request, to
    execute arbitrary code. (CVE-2017-2608)

  - A flaw exists in the search box implementation due to
    the autocompletion feature displaying the names of
    restricted views. An authenticated, remote attacker can
    exploit this to disclose sensitive names of views.
    (CVE-2017-2609)

  - A stored cross-site scripting (XSS) vulnerability exists
    due to improper validation of input passed in user names
    before returning it to users. An authenticated, remote
    attacker can exploit this, via a specially crafted
    request, to execute arbitrary script code in a user's
    browser session. (CVE-2017-2610)

  - A flaw exists due to improper validation of permissions
    to the /workspaceCleanup and /fingerprintCleanup URLs.
    An authenticated, remote attacker can exploit this to
    cause a high load on the master and agents.
    (CVE-2017-2611)

  - A flaw exists due to a failure to properly restrict
    access to JDK download credentials. An authenticated,
    remote attacker can exploit this to overwrite the
    credentials, thereby causing builds to fail.
    (CVE-2017-2612)

  - A cross-site request forgery (XSRF) vulnerability exists
    due to a failure by HTTP GET requests to /user to
    require multiple steps, explicit confirmation, or a
    unique token when performing certain sensitive actions.
    An unauthenticated, remote attacker can exploit this, by
    convincing a user to follow a specially crafted link, to
    cause the creation of new temporary users.
    (CVE-2017-2613)

  - An information disclosure vulnerability which exists in 
    its re-key admin monitor component due to world readable 
    permissions being set on the directory it creates to 
    store secret information. An unauthenticated, remote 
    attacker can exploit this to disclose information 
    contained in this directory.
    (CVE-2017-1000362)");

  script_set_attribute(attribute:"see_also", value:"https://jenkins.io/security/advisory/2017-02-01/");
  script_set_attribute(attribute:"see_also", value:"https://www.cloudbees.com/cloudbees-security-advisory-2017-02-01");
  script_set_attribute(attribute:"see_also", value:"https://jenkins.io/changelog/");
  script_set_attribute(attribute:"see_also", value:"https://jenkins.io/changelog-stable/");
  script_set_attribute(attribute:"solution", value:
"Upgrade Jenkins to version 2.44 or later, Jenkins LTS to version
2.32.2 or later, or Jenkins Operations Center to version 1.625.22.1 /
2.7.22.0.1 / 2.32.2.1 or later, or Jenkins Enterprise to version
1.651.22.1 / 2.7.22.0.1 / 2.32.2.1 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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-2608");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/07/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/08");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cloudbees:jenkins");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("jenkins_detect.nasl");
  script_require_ports("Services/www", 8080);
  script_require_keys("installed_sw/Jenkins");

  exit(0);
}

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

app = "Jenkins";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:8080);

install = get_single_install(
  app_name : app,
  port     : port,
  exit_if_unknown_ver : TRUE
);

dir = install['path'];
version = install['version'];
edition = install['Edition'];
app = app + " " + edition;
install_url = build_url(port:port, qs:dir);
fix = NULL;

if (edition == "Enterprise")
{
  if ( version =~ "^1\." )
    fix = "1.651.22.1";
  else if ( version =~ "^2\.7\.(\d)+\.0\." )
    fix = "2.7.22.0.1";
  else
    fix = "2.32.2.1";
}
else if (edition == "Operations Center")
{
  if ( version =~ "^1\." )
    fix = "1.625.22.1";
  else if ( version =~ "^2\.7\.(\d)+\.0\." )
    fix = "2.7.22.0.1";
  else
    fix = "2.32.2.1";
}
else if (edition == "Open Source LTS")
{
  fix = '2.32.2';
}
else if (edition == "Open Source")
{
  fix = '2.44';
}

if (isnull(fix))
  audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, version);

if (ver_compare(ver:version, fix:fix, strict:FALSE) < 0)
{
  order = make_list("URL", "Product", "Version", "Fixed Version");
  report = make_array(
    order[0], install_url,
    order[1], app,
    order[2], version,
    order[3], fix
  );
  report = report_items_str(report_items:report, ordered_fields:order);

  security_report_v4(port:port, severity:SECURITY_WARNING, extra:report, xss:TRUE, xsrf:TRUE);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url, version);
  • NASL familyFreeBSD Local Security Checks
    NASL idFREEBSD_PKG_5CFA9D0C73D74642AF4F28FBED9E9404.NASL
    descriptionJenkins Security Advisory : Please reference CVE/URL list for details
    last seen2020-06-01
    modified2020-06-02
    plugin id96939
    published2017-02-02
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/96939
    titleFreeBSD : jenkins -- multiple vulnerabilities (5cfa9d0c-73d7-4642-af4f-28fbed9e9404)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2019 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(96939);
  script_version("3.9");
  script_cvs_date("Date: 2019/07/10 16:04:13");

  script_cve_id("CVE-2011-4969", "CVE-2015-0886", "CVE-2017-2598", "CVE-2017-2599", "CVE-2017-2600", "CVE-2017-2601", "CVE-2017-2602", "CVE-2017-2603", "CVE-2017-2604", "CVE-2017-2605", "CVE-2017-2606", "CVE-2017-2607", "CVE-2017-2608", "CVE-2017-2609", "CVE-2017-2610", "CVE-2017-2611", "CVE-2017-2612", "CVE-2017-2613");

  script_name(english:"FreeBSD : jenkins -- multiple vulnerabilities (5cfa9d0c-73d7-4642-af4f-28fbed9e9404)");
  script_summary(english:"Checks for updated packages in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote FreeBSD host is missing one or more security-related
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Jenkins Security Advisory :

Please reference CVE/URL list for details"
  );
  # https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2017-02-01
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?f48db5ed"
  );
  # https://vuxml.freebsd.org/freebsd/5cfa9d0c-73d7-4642-af4f-28fbed9e9404.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?42cc67a2"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:jenkins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:jenkins-lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/02/02");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"jenkins<2.44")) flag++;
if (pkg_test(save_report:TRUE, pkg:"jenkins-lts<2.32.2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References