Vulnerabilities > CVE-2017-2612 - Incorrect Permission Assignment for Critical Resource vulnerability in Jenkins
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
LOW Availability impact
LOW Summary
In Jenkins before versions 2.44, 2.32.2 low privilege users were able to override JDK download credentials (SECURITY-392), resulting in future builds possibly failing to download a JDK.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing Functionality Not Properly Constrained by ACLs In applications, particularly web applications, access to functionality is mitigated by the authorization framework, whose job it is to map ACLs to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application or can run queries for data that he is otherwise not supposed to.
- Privilege Abuse An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.
- Directory Indexing An adversary crafts a request to a target that results in the target listing/indexing the content of a directory as output. One common method of triggering directory contents as output is to construct a request containing a path that terminates in a directory name rather than a file name since many applications are configured to provide a list of the directory's contents when such a request is received. An adversary can use this to explore the directory tree on a target as well as learn the names of files. This can often end up revealing test files, backup files, temporary files, hidden files, configuration files, user accounts, script contents, as well as naming conventions, all of which can be used by an attacker to mount additional attacks.
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Exploiting Incorrectly Configured Access Control Security Levels An attacker exploits a weakness in the configuration of access controls and is able to bypass the intended protection that these measures guard against and thereby obtain unauthorized access to the system or network. Sensitive functionality should always be protected with access controls. However configuring all but the most trivial access control systems can be very complicated and there are many opportunities for mistakes. If an attacker can learn of incorrectly configured access security settings, they may be able to exploit this in an attack. Most commonly, attackers would take advantage of controls that provided too little protection for sensitive activities in order to perform actions that should be denied to them. In some circumstances, an attacker may be able to take advantage of overly restrictive access control policies, initiating denial of services (if an application locks because it unexpectedly failed to be granted access) or causing other legitimate actions to fail due to security. The latter class of attacks, however, is usually less severe and easier to detect than attacks based on inadequate security restrictions. This attack pattern differs from CAPEC 1, "Accessing Functionality Not Properly Constrained by ACLs" in that the latter describes attacks where sensitive functionality lacks access controls, where, in this pattern, the access control is present, but incorrectly configured.
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");
References
- http://www.securityfocus.com/bid/95957
- http://www.securityfocus.com/bid/95957
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2612
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2612
- https://github.com/jenkinsci/jenkins/commit/a814154695e23dc37542af7d40cacc129cf70722
- https://github.com/jenkinsci/jenkins/commit/a814154695e23dc37542af7d40cacc129cf70722
- https://jenkins.io/security/advisory/2017-02-01/
- https://jenkins.io/security/advisory/2017-02-01/