Siemens DHCP Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2021-25217)

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

include('compat.inc');

if (description)
{
  script_id(501623);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/21");

  script_cve_id("CVE-2021-25217");
  script_xref(name:"FEDORA", value:"FEDORA-2021-08cdb4dc34");
  script_xref(name:"FEDORA", value:"FEDORA-2021-8ca8263bde");
  script_xref(name:"GLSA", value:"GLSA-202305-22");

  script_name(english:"Siemens DHCP Improper Restriction of Operations within the Bounds of a Memory Buffer (CVE-2021-25217)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"In ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16, ISC DHCP 4.4.0 -> 4.4.2 (Other
branches of ISC DHCP (i.e., releases in the 4.0.x series or lower and
releases in the 4.3.x series) are beyond their End-of-Life (EOL) and
no longer supported by ISC. From inspection it is clear that the
defect is also present in releases from those series, but they have
not been officially tested for the vulnerability), The outcome of
encountering the defect while reading a lease that will trigger it
varies, according to: the component being affected (i.e., dhclient or
dhcpd) whether the package was built as a 32-bit or 64-bit binary
whether the compiler flag -fstack-protection-strong was used when
compiling In dhclient, ISC has not successfully reproduced the error
on a 64-bit system. However, on a 32-bit system it is possible to
cause dhclient to crash when reading an improper lease, which could
cause network connectivity problems for an affected system due to the
absence of a running DHCP client process. In dhcpd, when run in DHCPv4
or DHCPv6 mode: if the dhcpd server binary was built for a 32-bit
architecture AND the -fstack-protection-strong flag was specified to
the compiler, dhcpd may exit while parsing a lease file containing an
objectionable lease, resulting in lack of service to clients.
Additionally, the offending lease and the lease immediately following
it in the lease database may be improperly deleted. if the dhcpd
server binary was built for a 64-bit architecture OR if the -fstack-
protection-strong compiler flag was NOT specified, the crash will not
occur, but it is possible for the offending lease and the lease which
immediately followed it to be improperly deleted.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"https://kb.isc.org/docs/cve-2021-25217");
  script_set_attribute(attribute:"see_also", value:"http://www.openwall.com/lists/oss-security/2021/05/26/6");
  script_set_attribute(attribute:"see_also", value:"https://lists.debian.org/debian-lts-announce/2021/06/msg00002.html");
  # https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5QI4DYC7J4BGHEW3NH4XHMWTHYC36UK4/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3edcf43d");
  # https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2LB42JWIV4M4WDNXX5VGIP26FEYWKIF/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f4f22628");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-406691.pdf");
  script_set_attribute(attribute:"see_also", value:"https://security.netapp.com/advisory/ntap-20220325-0011/");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf");
  script_set_attribute(attribute:"see_also", value:"https://security.gentoo.org/glsa/202305-22");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-25217");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(119);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/05/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/14");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_mx5000_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1400_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1500_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1501_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1510_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1511_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1512_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1524_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx1536_firmware");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:ruggedcom_rox_rx5000_firmware");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Siemens");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Siemens');

var asset = tenable_ot::assets::get(vendor:'Siemens');

var vuln_cpes = {
    "cpe:/o:siemens:ruggedcom_rox_rx1400_firmware" :
        {"versionEndExcluding" : "2.15.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1500_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1501_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1510_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1511_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1512_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1524_firmware" :
        {"versionEndExcluding" : "2.15.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx1536_firmware" :
        {"versionEndExcluding" : "2.15.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_rx5000_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"},
    "cpe:/o:siemens:ruggedcom_rox_mx5000_firmware" :
        {"versionEndExcluding" : "2.15.0", "versionStartIncluding" : "2.3.0", "family" : "RuggedCom"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_NOTE);