Juniper Junos OS Vulnerability (JSA100050)

#TRUSTED 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
#TRUST-RSA-SHA256 42ced4a26538495999892bc2f92fb4d9807b7b303fbfdcc76b4dd11289c05620241101b8519ffe0b313fc640c406262d7dc80813d131e04d0a07cdf233494ea8a0b9ebb8d42c01d0852ffa7a3029384278e40f49e1781d6bcfdcff89cb870ea4450d8d467c25908fc7f9c84d017af1e9eb9eecff7fbb7e617ea7c831bcbf50087af8b9ff64912df9394dac47cabcff5e4c053270c3b648c2f9f39196bddebec25d05123e8ab499682d2612ea38aea9a5eb3e87e017527cb9b71aa00005db8253ec242be7de2076052f5d317799e759ebbbcb8780e35c196485eb287054cac3b738269e772607d8df547dd2c20461534b20a5b2090eddd16577eabc0d69f9d268b0a1f03719a242bb303281ba261659ec6e8c14284dd7a5d76f875de99551d6157f180b49b24c1746f0a2ce1c9cb3e3a65d466fa6e0926a10ba84a8432ee888ef4477ac98c94566e93c82eb7bc8241dc88881f23ba16b16412debf1f64e0cc371dab2185ca39c7550e37b354cc6f1de83ac189ee4483b69abcf3f54782c8b79af509e9810bc6b73bfe1fe5bf11b844a96cb090ff5e000dd06feb968fc8e49d4c606c42d0e6fa3b8b2d8d428bb366270e7f16f7da1c60423ed5660d5cd9328afea89c4e06d86b4456f3c1c449db3801f45b1ea58e21fa14fec9684efc601ef417e3228b9239ffaea0a0937ca1c736cac2df3c60a9841d70398b1256cacc555930b
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(243979);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/06");

  script_cve_id("CVE-2025-52946");
  script_xref(name:"JSA", value:"JSA100050");
  script_xref(name:"IAVA", value:"2025-A-0510");

  script_name(english:"Juniper Junos OS Vulnerability (JSA100050)");

  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 JSA100050
advisory.

  - A Use After Free vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and 
    Juniper Networks Junos OS Evolved allows an attacker sending a BGP update with a specifically malformed 
    AS PATH to cause rpd to crash, resulting in a Denial of Service (DoS). Continuous receipt of the 
    malformed AS PATH attribute will cause a sustained DoS condition. On all Junos OS and Junos OS Evolved 
    platforms, the rpd process will crash and restart when a specifically malformed AS PATH is received 
    within a BGP update and traceoptions are enabled. This issue only affects systems with BGP traceoptions 
    enabled and requires a BGP session to be already established. Systems without BGP traceoptions enabled 
    are not impacted by this issue. (CVE-2025-52946)

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-With-traceoptions-enabled-receipt-of-malformed-AS-PATH-causes-RPD-crash-CVE-2025-52946
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?20973523");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA100050");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/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/V:C/RE:M");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-52946");

  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:"2024/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/06");

  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) 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');
include('junos_kb_cmd_func.inc');


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':'0.0-EVO', 'fixed_ver':'22.4R3-S5-EVO'},
  {'min_ver':'21.4', 'fixed_ver':'21.5.0', 'fixed_display':'See vendor advisory'},
  {'min_ver':'22.2', 'fixed_ver':'22.2R3-S6'},
  {'min_ver':'22.4', 'fixed_ver':'22.4R3-S5'},
  {'min_ver':'23.2', 'fixed_ver':'23.2R2-S3'},
  {'min_ver':'23.2-EVO', 'fixed_ver':'23.2R2-S3-EVO'},
  {'min_ver':'23.4', 'fixed_ver':'23.4R2-S4'},
  {'min_ver':'23.4-EVO', 'fixed_ver':'23.4R2-S4-EVO'},
  {'min_ver':'24.2', 'fixed_ver':'24.2R2'},
  {'min_ver':'24.2-EVO', 'fixed_ver':'24.2R2-EVO'}
];

var override = TRUE;
var buf = junos_command_kb_item(cmd:'show configuration | display set');
if (buf)
{
  var conf1 = junos_check_config(buf:buf, pattern:"^set protocols bgp traceoptions");
  var conf2 = junos_check_config(buf:buf, pattern:"^set protocols bgp group.*traceoptions");

  if (!(conf1 || conf2))
    audit(AUDIT_OS_CONF_NOT_VULN, 'Junos OS');
  override = FALSE;
}
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:override, severity:SECURITY_HOLE);