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nessusThis script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.TENABLE_OT_SPRECHERAUTOMATION_CVE-2019-11479.NASL
HistoryOct 03, 2023 - 12:00 a.m.

Sprecher Automation SPRECON-E TCP SACK PANIC (CVE-2019-11479)

2023-10-0300:00:00
This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
12
sprecher automation
sprecon-e
tcp sack panic
cve-2019-11479
linux kernel
mss
hard-coded
remote attacker
denial of service
stable kernel releases
tenable.ot
falcon
pu244x
t3 mc33/34
product series
vulnerability scanner

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.974 High

EPSS

Percentile

99.9%

Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.

An analysis for SPRECON-E systems lead to the result, that only FALCON (PU244x) and T3 MC33/34 product series are affected.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

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

include('compat.inc');

if (description)
{
  script_id(501748);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/04");

  script_cve_id("CVE-2019-11479");
  script_xref(name:"RHSA", value:"RHSA-2019:1594");
  script_xref(name:"RHSA", value:"RHSA-2019:1602");
  script_xref(name:"RHSA", value:"RHSA-2019:1699");
  script_xref(name:"CEA-ID", value:"CEA-2019-0456");

  script_name(english:"Sprecher Automation SPRECON-E TCP SACK PANIC (CVE-2019-11479)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Jonathan Looney discovered that the Linux kernel default MSS is hard-coded
to 48 bytes. This allows a remote peer to fragment TCP resend queues
significantly more than if a larger MSS were enforced. A remote attacker
could use this to cause a denial of service. This has been fixed in stable
kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in 
commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 
5f3e2bf008c2221478101ee72f5cb4654b9fc363.

An analysis for SPRECON-E systems lead to the result, that only
FALCON (PU244x) and T3 MC33/34 product series are affected.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?774b082f");
  # https://www.cert.at/de/warnungen/2019/6/warnungen-20190618
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?27335f5c");
  # https://www.sprecher-automation.com/en/it-security/security-alerts
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?178ab433");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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-2019-11479");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(400);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/03");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:sprecher-automation:sprecon-e:8.64b");
  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 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/SprecherAutomation');

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

var vuln_cpes = {
    "cpe:/o:sprecher-automation:sprecon-e:8.64b" :
        {"versionEndExcluding" : "8.64b", "family" : "SPRECONE"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_WARNING);
VendorProductVersionCPE
sprecher-automationsprecon-e8.64bcpe:/o:sprecher-automation:sprecon-e:8.64b

5 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

0.974 High

EPSS

Percentile

99.9%