Juniper Junos OS Multiple Vulnerabilities (JSA73177)

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

include('compat.inc');

if (description)
{
  script_id(310772);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/29");

  script_cve_id(
    "CVE-2023-26551",
    "CVE-2023-26552",
    "CVE-2023-26553",
    "CVE-2023-26554",
    "CVE-2023-26555"
  );
  script_xref(name:"JSA", value:"JSA73177");

  script_name(english:"Juniper Junos OS Multiple Vulnerabilities (JSA73177)");

  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 multiple vulnerabilities as referenced in the
JSA73177 advisory.

  - praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method
    would be complex, e.g., with a manipulated GPS receiver. (CVE-2023-26555)

  - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop. An
    adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26551)

  - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a decimal point. An
    adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26552)

  - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number.
    An adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26553)

  - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a '\0' character. An
    adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26554)

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://kb.juniper.net/JSA73177");
  script_set_attribute(attribute:"see_also", value:"http://www.bcp38.info/index.php/Main_Page");
  script_set_attribute(attribute:"see_also", value:"https://doc.ntp.org/support/securitynotice/ntpbug1532/");
  script_set_attribute(attribute:"see_also", value:"https://www.nwtime.org/news/ntp-winter-2013-network-drdos-attacks/");
  # https://supportportal.juniper.net/s/article/2023-10-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-Multiple-NTP-vulnerabilities-resolved
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c8e138af");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA73177");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:P/AC:H/PR:N/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-2023-26555");

  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:"2023/04/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/10/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/04/29");

  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':'0.0', 'fixed_ver':'20.4R3-S8'},
  {'min_ver':'0.0-EVO', 'fixed_ver':'20.4R3-S8-EVO'},
  {'min_ver':'21.1', 'fixed_ver':'21.1R1'},
  {'min_ver':'21.1-EVO', 'fixed_ver':'21.1R1-EVO'},
  {'min_ver':'21.3', 'fixed_ver':'21.3R3-S5'},
  {'min_ver':'21.3-EVO', 'fixed_ver':'21.3R3-S5-EVO'},
  {'min_ver':'21.4', 'fixed_ver':'21.4R3-S4'},
  {'min_ver':'21.4-EVO', 'fixed_ver':'21.4R3-S4-EVO'},
  {'min_ver':'22.1', 'fixed_ver':'22.1R3-S3'},
  {'min_ver':'22.1-EVO', 'fixed_ver':'22.1R3-S3-EVO'},
  {'min_ver':'22.2', 'fixed_ver':'22.2R3-S1'},
  {'min_ver':'22.2-EVO', 'fixed_ver':'22.2R3-S2-EVO'},
  {'min_ver':'22.3', 'fixed_ver':'22.3R2-S2', 'fixed_display':'22.3R2-S2, 22.3R3'},
  {'min_ver':'22.3-EVO', 'fixed_ver':'22.3R2-S2-EVO'},
  {'min_ver':'22.3R3-EVO', 'fixed_ver':'22.3R3-S1-EVO'},
  {'min_ver':'22.4', 'fixed_ver':'22.4R2-S1', 'fixed_display':'22.4R2-S1, 22.4R3'},
  {'min_ver':'22.4-EVO', 'fixed_ver':'22.4R2-S1-EVO'},
  {'min_ver':'22.4R3-EVO', 'fixed_ver':'22.4R3-EVO'},
  {'min_ver':'23.2', 'fixed_ver':'23.2R2'}
];

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);
var report = get_report(ver:ver, fix:fix);
security_report_v4(severity:SECURITY_WARNING, port:0, extra:report);