Juniper Junos OS Vulnerability (JSA100087)

#TRUSTED 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
#TRUST-RSA-SHA256 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
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(299304);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/02/17");

  script_cve_id("CVE-2025-52981");
  script_xref(name:"JSA", value:"JSA100087");
  script_xref(name:"IAVA", value:"2025-A-0510");

  script_name(english:"Juniper Junos OS Vulnerability (JSA100087)");

  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 JSA100087
advisory.

  - An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow processing daemon
    (flowd) of Juniper Networks Junos OS on SRX4600 and SRX5000 Series allows an unauthenticated and logically
    adjacent attacker to cause a Denial-of-Service (DoS). If in a multicast scenario a sequence of specific
    PIM packets is received, this will cause a flowd crash and restart, which leads to momentary service
    interruption. This issue affects Junos OS on SRX 4600 and SRX 5000 Series: * All versions before
    21.4R3-S9, * 22.2 versions before 22.2R3-S5, * 22.3 versions before 22.3R3-S4, * 22.4 versions before
    22.4R3-S4, * 23.2 versions before 23.2R2-S2, * 23.4 versions before 23.4R2, * 24.2 versions before
    24.2R1-S1, 24.2R2. (CVE-2025-52981)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://supportportal.juniper.net/s/article/2025-07-Security-Bulletin-Junos-OS-SRX-Series-Sequence-of-specific-PIM-packets-causes-a-flowd-crash-CVE-2025-52981
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d68f43e7");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA100087");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/AU:Y/R:A/RE:M");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-52981");

  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:"2024/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/17");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:juniper:junos");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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');
include('junos_kb_cmd_func.inc');

# MX device check
var model = get_kb_item_or_exit('Host/Juniper/model');
if (model !~ "^(SRX16|SRX23|SRX40|SRX50)")
{
  audit(AUDIT_DEVICE_NOT_VULN, model);
};

# SPC3 check
var buf = junos_command_kb_item(cmd:'show chassis fpc');
if (buf)
{
  if (buf !~ "SPC3" && model =~ "^SRX50") 
    audit(AUDIT_HOST_NOT, 'using an affected SPC3 card');
};

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

var vuln_ranges = [
  {'min_ver':'0.0', 'fixed_ver':'21.2R3-S9'},
  {'min_ver':'21.4', 'fixed_ver':'21.4R3-S11'},
  {'min_ver':'22.2', 'fixed_ver':'22.2R3-S7'},
  {'min_ver':'22.4', 'fixed_ver':'22.4R3-S6'},
  {'min_ver':'23.2', 'fixed_ver':'23.2R2-S4'},
  {'min_ver':'23.4', 'fixed_ver':'23.4R2-S4'},
  {'min_ver':'24.2', 'fixed_ver':'24.2R2'}
];

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);
junos_report(ver:ver, fix:fix, override:FALSE, severity:SECURITY_HOLE);