Vulnerabilities > CVE-2017-2607 - Cross-site Scripting vulnerability in Jenkins
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
SINGLE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
NONE Summary
jenkins before versions 2.44, 2.32.2 is vulnerable to a persisted cross-site scripting vulnerability in console notes (SECURITY-382). Jenkins allows plugins to annotate build logs, adding new content or changing the presentation of existing content while the build is running. Malicious Jenkins users, or users with SCM access, could configure jobs or modify build scripts such that they print serialized console notes that perform cross-site scripting attacks on Jenkins users viewing the build logs.
Vulnerable Configurations
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 family CGI abuses NASL id JENKINS_SECURITY_ADVISORY_2017-02-01.NASL description 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 last seen 2020-06-01 modified 2020-06-02 plugin id 97609 published 2017-03-08 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97609 title 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 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 family FreeBSD Local Security Checks NASL id FREEBSD_PKG_5CFA9D0C73D74642AF4F28FBED9E9404.NASL description Jenkins Security Advisory : Please reference CVE/URL list for details last seen 2020-06-01 modified 2020-06-02 plugin id 96939 published 2017-02-02 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96939 title FreeBSD : 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");