The version of Jenkins Enterprise or Jenkins Operations Center running on the remote web server is 2.277.x prior to 2.277.43.0.2, or 2.x prior to 2.303.3.3. It is, therefore, affected by multiple vulnerabilities, including the following:
Agent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier. (CVE-2021-21690)
Creating symbolic links is possible without the ‘symlink’ agent-to-controller access control permission in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier. (CVE-2021-21691)
FilePath#renameTo and FilePath#moveAllChildrenTo in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier only check ‘read’ agent-to-controller access permission on the source path, instead of ‘delete’.
(CVE-2021-21692)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(155631);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/07");
script_cve_id(
"CVE-2021-21685",
"CVE-2021-21686",
"CVE-2021-21687",
"CVE-2021-21688",
"CVE-2021-21689",
"CVE-2021-21690",
"CVE-2021-21691",
"CVE-2021-21692",
"CVE-2021-21693",
"CVE-2021-21694",
"CVE-2021-21695",
"CVE-2021-21696",
"CVE-2021-21697",
"CVE-2021-21698"
);
script_name(english:"Jenkins Enterprise and Operations Center < 2.277.43.0.2 / 2.303.3.3 Multiple Vulnerabilities (CloudBees Security Advisory 2021-11-04)");
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 Enterprise or Jenkins Operations Center running on the remote web server is 2.277.x prior to
2.277.43.0.2, or 2.x prior to 2.303.3.3. It is, therefore, affected by multiple vulnerabilities, including the
following:
- Agent processes are able to completely bypass file path filtering by wrapping the file operation in an
agent file path in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier. (CVE-2021-21690)
- Creating symbolic links is possible without the 'symlink' agent-to-controller access control permission in
Jenkins 2.318 and earlier, LTS 2.303.2 and earlier. (CVE-2021-21691)
- FilePath#renameTo and FilePath#moveAllChildrenTo in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier
only check 'read' agent-to-controller access permission on the source path, instead of 'delete'.
(CVE-2021-21692)
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://www.cloudbees.com/cloudbees-security-advisory-2021-11-04");
script_set_attribute(attribute:"solution", value:
"Upgrade Jenkins Enterprise or Jenkins Operations Center to version 2.277.43.0.2, 2.303.3.3, or later.");
script_set_attribute(attribute:"agent", value:"all");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/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-2021-21696");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/04");
script_set_attribute(attribute:"patch_publication_date", value:"2021/11/04");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/19");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/a:cloudbees:jenkins");
script_set_attribute(attribute:"thorough_tests", value:"true");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CGI abuses");
script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("jenkins_detect.nasl", "jenkins_win_installed.nbin", "jenkins_nix_installed.nbin", "macosx_jenkins_installed.nbin");
script_require_keys("installed_sw/Jenkins");
exit(0);
}
include('vcf.inc');
include('vcf_extras.inc');
var app_info = vcf::combined_get_app_info(app:'Jenkins');
var constraints = [
{ 'min_version' : '2.277', 'fixed_version' : '2.277.43.0.2', 'edition' : make_list('Enterprise', 'Operations Center') },
{ 'min_version' : '2', 'fixed_version' : '2.303.3.3', 'edition' : make_list('Enterprise', 'Operations Center'), 'rolling_train' : TRUE },
];
vcf::jenkins::check_version_and_report(
app_info:app_info,
constraints:constraints,
severity:SECURITY_HOLE
);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21685
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21686
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21687
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21688
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21689
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21690
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21691
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21692
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21693
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21694
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21695
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21696
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21697
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21698
www.cloudbees.com/cloudbees-security-advisory-2021-11-04