Juniper Junos OS Vulnerability (JSA100053)

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

include('compat.inc');

if (description)
{
  script_id(241652);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/07/18");

  script_cve_id("CVE-2025-52949");
  script_xref(name:"JSA", value:"JSA100053");
  script_xref(name:"IAVA", value:"2025-A-0510");

  script_name(english:"Juniper Junos OS Vulnerability (JSA100053)");

  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 JSA100053
advisory.

  - An Improper Handling of Length Parameter Inconsistency vulnerability in the routing protocol daemon (rpd)
    of Juniper Networks Junos OS and Junos OS Evolved allows a logically adjacent BGP peer sending a
    specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service
    (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS)
    condition. Only systems configured for Ethernet Virtual Private Networking (EVPN) signaling are vulnerable
    to this issue. This issue affects iBGP and eBGP, and both IPv4 and IPv6 are affected by this
    vulnerability.This issue affects: Junos OS: * all versions before 21.4R3-S11, * from 22.2 before
    22.2R3-S7, * from 22.4 before 22.4R3-S7, * 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; Junos OS Evolved: * all versions before
    22.2R3-S7-EVO, * from 22.4-EVO before 22.4R3-S7-EVO, * from 23.2-EVO before 23.2R2-S4-EVO, * from 23.4-EVO
    before 23.4R2-S5-EVO, * from 24.2-EVO before 24.2R2-S1-EVO, * from 24.4-EVO before 24.4R1-S3-EVO,
    24.4R2-EVO. (CVE-2025-52949)

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-and-Junos-OS-Evolved-In-an-EVPN-environment-receipt-of-a-specifically-malformed-BGP-update-causes-RPD-crash-CVE-2025-52949
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c2b54430");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA100053");
  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:A/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/V:C/RE:M/U:Green");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-52949");

  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:"2025/07/09");

  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_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) 2025 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':'22.2', 'fixed_ver':'22.2R3-S7'},
  {'min_ver':'22.4', 'fixed_ver':'22.4R3-S7'},
  {'min_ver':'22.4-EVO', 'fixed_ver':'22.4R3-S7-EVO'},
  {'min_ver':'23.2', 'fixed_ver':'23.2R2-S4'},
  {'min_ver':'23.2-EVO', 'fixed_ver':'23.2R2-S4-EVO'},
  {'min_ver':'23.4', 'fixed_ver':'23.4R2-S5'},
  {'min_ver':'23.4-EVO', 'fixed_ver':'23.4R2-S5-EVO'},
  {'min_ver':'24.2', 'fixed_ver':'24.2R2-S1'},
  {'min_ver':'24.2-EVO', 'fixed_ver':'24.2R2-S1-EVO'},
  {'min_ver':'24.4', 'fixed_ver':'24.4R1-S3', 'fixed_display':'24.4R1-S3, 24.4R2'},
  {'min_ver':'24.4-EVO', 'fixed_ver':'24.4R1-S3-EVO', 'fixed_display':'24.4R1-S3-EVO, 24.4R2-EVO'}
];

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);