Vulnerabilities > CVE-2018-1999043 - Missing Release of Resource after Effective Lifetime vulnerability in Jenkins
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
A denial of service vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in BasicAuthenticationFilter.java, BasicHeaderApiTokenAuthenticator.java that allows attackers to create ephemeral in-memory user records by attempting to log in using invalid credentials.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- HTTP DoS An attacker performs flooding at the HTTP level to bring down only a particular web application rather than anything listening on a TCP/IP connection. This denial of service attack requires substantially fewer packets to be sent which makes DoS harder to detect. This is an equivalent of SYN flood in HTTP. The idea is to keep the HTTP session alive indefinitely and then repeat that hundreds of times. This attack targets resource depletion weaknesses in web server software. The web server will wait to attacker's responses on the initiated HTTP sessions while the connection threads are being exhausted.
Nessus
NASL family CGI abuses NASL id JENKINS_2_138.NASL description The version of Jenkins running on the remote web server is prior to 2.138 or is a version of Jenkins LTS prior to 2.121.3. It is, therefore, affected by multiple vulnerabilities. Note that Nessus has not tested for these issues but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 117337 published 2018-09-06 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/117337 title Jenkins < 2.121.3 / 2.138 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(117337); script_version("1.4"); script_cvs_date("Date: 2019/11/01"); script_cve_id( "CVE-2018-1999042", "CVE-2018-1999043", "CVE-2018-1999044", "CVE-2018-1999045", "CVE-2018-1999046", "CVE-2018-1999047" ); script_name(english:"Jenkins < 2.121.3 / 2.138 Multiple Vulnerabilities"); script_summary(english:"Checks the Jenkins version."); script_set_attribute(attribute:"synopsis", value: "A job scheduling and management system hosted on the remote web server is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Jenkins running on the remote web server is prior to 2.138 or is a version of Jenkins LTS prior to 2.121.3. It is, therefore, affected by multiple vulnerabilities. Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number."); script_set_attribute(attribute:"see_also", value:"https://jenkins.io/security/advisory/2018-08-15/"); script_set_attribute(attribute:"solution", value: "Upgrade Jenkins to version 2.138 or later, Jenkins LTS to version 2.121.3 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/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:L/UI:N/S:U/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-2018-1999045"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/15"); script_set_attribute(attribute:"patch_publication_date", value:"2018/08/15"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/06"); 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) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("jenkins_detect.nasl"); script_require_keys("www/Jenkins"); script_require_ports("Services/www", 8080); exit(0); } include("audit.inc"); include("global_settings.inc"); include("misc_func.inc"); include("http.inc"); include("vcf.inc"); port = get_http_port(default:8080); app = vcf::get_app_info(app:"Jenkins", webapp:TRUE, port:port); if(app["LTS"]) constraints = [{"fixed_version" : "2.121.3", "fixed_display" : "2.121.3 LTS / 2.138"}]; else constraints = [{"fixed_version" : "2.138", "fixed_display" : "2.121.3 LTS / 2.138"}]; vcf::check_version_and_report(app_info:app, constraints:constraints, severity:SECURITY_WARNING, strict:FALSE);
NASL family CGI abuses NASL id JENKINS_2_146.NASL description The version of Jenkins running on the remote web server is prior to 2.146 or is a version of Jenkins LTS prior to 2.138.2. 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 118147 published 2018-10-16 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/118147 title Jenkins < 2.138.2 (LTS) / 2.146 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(118147); script_version("1.5"); script_cvs_date("Date: 2019/11/01"); script_cve_id( "CVE-2018-1000406", "CVE-2018-1000407", "CVE-2018-1000408", "CVE-2018-1000409", "CVE-2018-1000410", "CVE-2018-1000997", "CVE-2018-1999043" ); script_bugtraq_id(106532); script_xref(name:"TRA", value:"TRA-2018-29"); script_name(english:"Jenkins < 2.138.2 (LTS) / 2.146 Multiple Vulnerabilities"); script_summary(english:"Checks the Jenkins version."); script_set_attribute(attribute:"synopsis", value: "A job scheduling and management system hosted on the remote web server is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Jenkins running on the remote web server is prior to 2.146 or is a version of Jenkins LTS prior to 2.138.2. 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-2018-1000407). - A denial of service (DoS) vulnerability exists in the HudsonPrivateSecurityRealm class of Jenkins. An unauthenticated, remote attacker can exploit this issue, by sending crafted, repeated HTTP requests to particular URLs, to cause the application to stop responding (CVE-2018-1000408). - A directory traversal vulnerability exists in the version of the Stapler Web Framework, which is bundled with Jenkins. 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-2018-1000997). Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number."); script_set_attribute(attribute:"see_also", value:"https://jenkins.io/security/advisory/2018-10-10/"); script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/research/tra-2018-29"); script_set_attribute(attribute:"solution", value: "Upgrade Jenkins to version 2.146 or later, Jenkins LTS to version 2.138.2 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/UI:N/S:U/C:N/I:L/A:L"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-1000408"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/10"); script_set_attribute(attribute:"patch_publication_date", value:"2018/10/10"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/16"); 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) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("jenkins_detect.nasl"); script_require_keys("www/Jenkins"); script_require_ports("Services/www", 8080); exit(0); } include('http.inc'); include('vcf.inc'); include('vcf_extras.inc'); port = get_http_port(default:8080); app_info = vcf::get_app_info(app:'Jenkins', port:port, webapp:TRUE); constraints = [ {'edition':'Open Source', 'fixed_version':'2.146'}, {'edition':'Open Source LTS', 'fixed_version':'2.138.2'} ]; vcf::jenkins::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);
Redhat
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