Juniper Junos OS Vulnerability (JSA75743)

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

include('compat.inc');

if (description)
{
  script_id(193492);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/18");

  script_cve_id("CVE-2024-21602");
  script_xref(name:"JSA", value:"JSA75743");

  script_name(english:"Juniper Junos OS Vulnerability (JSA75743)");

  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 JSA75743
advisory.

  - A NULL Pointer Dereference vulnerability in Juniper Networks Junos OS Evolved on ACX7024, ACX7100-32C and
    ACX7100-48L allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). If a
    specific IPv4 UDP packet is received and sent to the Routing Engine (RE) packetio crashes and restarts
    which causes a momentary traffic interruption. Continued receipt of such packets will lead to a sustained
    DoS. This issue does not happen with IPv6 packets. This issue affects Juniper Networks Junos OS Evolved on
    ACX7024, ACX7100-32C and ACX7100-48L: * 21.4-EVO versions earlier than 21.4R3-S6-EVO; * 22.1-EVO versions
    earlier than 22.1R3-S5-EVO; * 22.2-EVO versions earlier than 22.2R2-S1-EVO, 22.2R3-EVO; * 22.3-EVO
    versions earlier than 22.3R2-EVO. This issue does not affect Juniper Networks Junos OS Evolved versions
    earlier than 21.4R1-EVO. (CVE-2024-21602)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://supportportal.juniper.net/s/article/2024-01-Security-Bulletin-Junos-OS-Evolved-ACX7024-ACX7100-32C-and-ACX7100-48L-Traffic-stops-when-a-specific-IPv4-UDP-packet-is-received-by-the-RE-CVE-2024-21602
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9aada67d");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant Junos software release referenced in Juniper advisory JSA75743");
  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:"cvss_score_source", value:"CVE-2024-21602");

  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:"2024/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/18");

  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) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("junos_version.nasl");
  script_require_keys("Host/Juniper/JUNOS/Version", "Host/Juniper/model");

  exit(0);
}

include('junos.inc');

var model = get_kb_item_or_exit('Host/Juniper/model');
if (model !~ "^(ACX7024|ACX7100)")
{
  audit(AUDIT_DEVICE_NOT_VULN, model);
}

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

var vuln_ranges = [
  {'min_ver':'21.4-EVO', 'fixed_ver':'21.4R3-S6-EVO', 'model':'^(ACX7024|ACX7100)'},
  {'min_ver':'22.1-EVO', 'fixed_ver':'22.1R3-S5-EVO', 'model':'^(ACX7024|ACX7100)'},
  {'min_ver':'22.2-EVO', 'fixed_ver':'22.2R2-S1-EVO', 'model':'^(ACX7024|ACX7100)'},
  {'min_ver':'22.2R3', 'fixed_ver':'22.2R3-EVO', 'model':'^(ACX7024|ACX7100)'},
  {'min_ver':'22.3-EVO', 'fixed_ver':'22.3R2-EVO', 'model':'^(ACX7024|ACX7100)'}
];

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_HOLE, port:0, extra:report);