Jenkins LTS < 2.568.3 / Jenkins weekly < 2.580 Multiple Vulnerabilities

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(342360);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/02");

  script_cve_id(
    "CVE-2026-84646",
    "CVE-2026-84647",
    "CVE-2026-84648",
    "CVE-2026-84649",
    "CVE-2026-84650",
    "CVE-2026-84651",
    "CVE-2026-84652",
    "CVE-2026-84654",
    "CVE-2026-84655",
    "CVE-2026-84656",
    "CVE-2026-84657"
  );
  script_xref(name:"JENKINS", value:"2026-09-02");

  script_name(english:"Jenkins LTS < 2.568.3 / Jenkins weekly < 2.580 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"An application running on a remote web server host is affected by multiple vulnerabilities");
  script_set_attribute(attribute:"description", value:
"According to its its self-reported version number, the version of Jenkins running on the remote web server is Jenkins
LTS prior to 2.568.3 or Jenkins weekly prior to 2.580. It is, therefore, affected by multiple vulnerabilities:

  - In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, transient fields cannot be excluded from
    deserialization, allowing attackers able to submit configuration updates to specify the values of
    transient fields that will be deserialized, the impact depending on how those fields are used.
    (CVE-2026-84650)

  - In Stapler 1839.ved17667b_a_eb_5 through 2107.v8dfcb_e8ed317 (both inclusive), except
    2088.2093.vd7c3e58008a_6, included in Jenkins 2.447 through 2.579 (both inclusive), LTS 2.452.1 through
    2.568.2 (both inclusive), an HTTP endpoint serving dynamically generated JavaScript resources embeds the
    user's cross-site request forgery (CSRF) token (crumb) as a string literal, allowing attackers with
    control over a page hosted on the same site as Jenkins to obtain a valid crumb for the targeted user's
    session and perform actions on their behalf. (CVE-2026-84649)

  - In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, user objects can appear as nested field values in
    other deserialized XML objects, allowing attackers with Overall/Read permission to create user objects by
    submitting crafted XML. (CVE-2026-84646)

  - In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer does not escape log record
    metadata (source, level, and timestamp) resulting in a stored cross-site scripting (XSS) vulnerability
    exploitable by attackers in control of agent processes. (CVE-2026-84648)

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/2026-09-02");
  script_set_attribute(attribute:"solution", value:
"Upgrade Jenkins weekly to version 2.580 or later, or Jenkins LTS to version 2.568.3 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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-2026-84649");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-84650");

  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:"2026/09/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/02");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cloudbees:jenkins");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:jenkins:jenkins");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2026 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_extras.inc');

var constraints = [
  { 'max_version' : '2.579', 'fixed_version' : '2.580', 'edition' : 'Open Source' },
  { 'max_version' : '2.568.2', 'fixed_version' : '2.568.3', 'edition' : 'Open Source LTS' }
];

var app_info = vcf::combined_get_app_info(app:'Jenkins');

vcf::jenkins::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_HOLE,
    flags:{'xsrf':TRUE, 'xss':TRUE}
);