Juniper Junos OS Vulnerability (JSA100057)

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

include('compat.inc');

if (description)
{
  script_id(310427);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/27");

  script_cve_id("CVE-2025-30661");
  script_xref(name:"JSA", value:"JSA100057");

  script_name(english:"Juniper Junos OS Vulnerability (JSA100057)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA100057
advisory.

  - An Incorrect Permission Assignment for Critical Resource vulnerability in line card script processing of
    Juniper Networks Junos OS allows a local, low-privileged user to install scripts to be executed as root,
    leading to privilege escalation. A local user with access to the local file system can copy a script to
    the router in a way that will be executed as root, as the system boots. Execution of the script as root
    can lead to privilege escalation, potentially providing the adversary complete control of the system. This
    issue only affects specific line cards, such as the MPC10, MPC11, LC4800, LC9600, MX304-LMIC16, SRX4700,
    and EX9200-15C. This issue affects Junos OS: * from 23.2 before 23.2R2-S4, * from 23.4 before 23.4R2-S5, *
    from 24.2 before 24.2R2-S1, * from 24.4 before 24.4R1-S3, 24.4R2. This issue does not affect versions
    prior to 23.1R2. (CVE-2025-30661)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://github.com/orangecertcc/security-research/security/advisories/GHSA-2p66-9j7x-fmch
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?de534464");
  # https://supportportal.juniper.net/s/article/2025-07-Security-Bulletin-Junos-OS-Low-privileged-user-can-cause-script-to-run-as-root-leading-to-privilege-escalation-CVE-2025-30661
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3342c169");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA100057");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/AC:L/PR:L/UI:R/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:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/AU:N/R:U/RE:M/U:Amber");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-30661");

  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:"2025/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/27");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Junos Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("junos_version.nasl");
  script_require_keys("Host/Juniper/JUNOS/Version");

  exit(0);
}

include('junos.inc');


var ver = get_kb_item_or_exit('Host/Juniper/JUNOS/Version');

var vuln_ranges = [
  {'min_ver':'23.2', 'fixed_ver':'23.2R2-S4'},
  {'min_ver':'23.4', 'fixed_ver':'23.4R2-S5'},
  {'min_ver':'24.2', 'fixed_ver':'24.2R2-S1'},
  {'min_ver':'24.4', 'fixed_ver':'24.4R1-S3', 'fixed_display':'24.4R1-S3, 24.4R2'}
];

var fix = junos_compare_range(target_version:ver, vuln_ranges:vuln_ranges);
if (empty_or_null(fix)) audit(AUDIT_INST_VER_NOT_VULN, 'Junos OS', ver);
var report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_WARNING, port:0, extra:report);