Vulnerabilities > CVE-2018-1999044 - Infinite Loop vulnerability in Jenkins

047910
CVSS 4.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
jenkins
CWE-835
nessus

Summary

A denial of service vulnerability exists in Jenkins 2.137 and earlier, 2.121.2 and earlier in CronTab.java that allows attackers with Overall/Read permission to have a request handling thread enter an infinite loop.

Vulnerable Configurations

Part Description Count
Application
Jenkins
961

Nessus

NASL familyCGI abuses
NASL idJENKINS_2_138.NASL
descriptionThe 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 seen2020-06-01
modified2020-06-02
plugin id117337
published2018-09-06
reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/117337
titleJenkins < 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);