Juniper Junos OS Vulnerability (JSA75759)

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

include('compat.inc');

if (description)
{
  script_id(197059);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/15");

  script_cve_id("CVE-2024-21618");
  script_xref(name:"JSA", value:"JSA75759");
  script_xref(name:"IAVA", value:"2024-A-0232");

  script_name(english:"Juniper Junos OS Vulnerability (JSA75759)");

  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 JSA75759
advisory.

  - An Access of Memory Location After End of Buffer vulnerability in the Layer-2 Control Protocols Daemon
    (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to
    cause Denial of Service (DoS). (CVE-2024-21618)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://supportportal.juniper.net/JSA75759");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA75759");
  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:"cvss_score_source", value:"CVE-2024-21618");

  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:"2024/04/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/05/15");

  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) 2024 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':'21.4', 'fixed_ver':'21.4R3-S4'},
  {'min_ver':'21.4-EVO', 'fixed_ver':'21.4R3-S5-EVO'},
  {'min_ver':'22.1', 'fixed_ver':'22.1R3-S4'},
  {'min_ver':'22.1-EVO', 'fixed_ver':'22.1R3-S4-EVO'},
  {'min_ver':'22.2', 'fixed_ver':'22.2R3-S2'},
  {'min_ver':'22.2-EVO', 'fixed_ver':'22.2R3-S2-EVO'},
  {'min_ver':'22.3', 'fixed_ver':'22.3R2-S2'},
  {'min_ver':'22.3-EVO', 'fixed_ver':'22.3R2-S2-EVO'},
  {'min_ver':'22.3R3', 'fixed_ver':'22.3R3-S1'},
  {'min_ver':'22.3R3', 'fixed_ver':'22.3R3-S1-EVO'},
  {'min_ver':'22.4', 'fixed_ver':'22.4R3'},
  {'min_ver':'22.4-EVO', 'fixed_ver':'22.4R3-EVO'},
  {'min_ver':'23.2', 'fixed_ver':'23.2R2'},
  {'min_ver':'23.2-EVO', 'fixed_ver':'23.2R2-EVO'}
];

var override = TRUE;
var buf = junos_command_kb_item(cmd:'show configuration | display set');
if (buf)
{
  override = FALSE;
  if (!junos_check_config(buf:buf, pattern:"^set protocols lldp"))
    audit(AUDIT_HOST_NOT, 'using a vulnerable configuration');
}

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_WARNING);