—–BEGIN PGP SIGNED MESSAGE—–
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2021.2401
Advisory (icsa-21-194-03) Siemens PROFINET Devices
15 July 2021
===========================================================================
AusCERT Security Bulletin Summary
———————————
Product: Siemens PROFINET Devices
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Denial of Service — Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-28400
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-03
– ————————–BEGIN INCLUDED TEXT——————–
ICS Advisory (ICSA-21-194-03)
Siemens PROFINET Devices
Original release date: July 13, 2021
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided
“as is” for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see https://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.5
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Siemens
o Equipment: PROFINET Devices
o Vulnerability: Allocation of Resources Without Limits or Throttling
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to
perform a denial-of-service attack if a large amount of PROFINET Discovery and
Configuration Protocol (DCP) reset packets is sent to the affected devices.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following Siemens products are affected:
o Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet
Controller: All versions
o Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200: All versions
o Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P: All versions
o RUGGEDCOM RM1224: All versions prior to v6.4
o SCALANCE M-800: All versions prior to v6.4
o SCALANCE S615: All versions prior to v6.4
o SCALANCE W700 IEEE 802.11n: All versions
o SCALANCE W700 IEEE 802.11ac: All versions
o SCALANCE X200-4 P IRT: All versions prior to v5.5.0
o SCALANCE X201-3P IRT: All versions prior to v5.5.0
o SCALANCE X201-3P IRT PRO: All versions prior to v5.5.0
o SCALANCE X202-2 IRT: All versions prior to v5.5.0
o SCALANCE X202-2P IRT (incl. SIPLUS NET variant): All versions prior to
v5.5.0
o SCALANCE X202-2P IRT PRO: All versions prior to v5.5.0
o SCALANCE X204 IRT: All versions prior to v5.5.0
o SCALANCE X204 IRT PRO: All versions prior to v5.5.0
o SCALANCE X204-2 (incl. SIPLUS NET variant): All versions
o SCALANCE X204-2FM: All versions
o SCALANCE X204-2LD (incl. SIPLUS NET variant): All versions
o SCALANCE X20204-2LD TS: All versions
o SCALANCE X204 -2TS: All versions
o SCALANCE X206-1: All versions
o SCALANCE X206-1LD (incl. SIPLUS NET variant): All versions
o SCALANCE X208 (incl. SIPLUS NET variant): All versions
o SCALANCE X208PRO: All versions
o SCALANCE X212-2: All versions
o SCALANCE X12-2LD: All versions
o SCALANCE X216: All versions
o SCALANCE X224: All versions
o SCALANCE X302-7EEC: All versions
o SCALANCE 304-2FE: All versions
o SCALANCE X306-1LDFE: All versions
o SCALANCE X307-2EEC: All versions
o SCALANCE X307-3: All versions
o SCALANCE X307-3LD: All versions
o SCALANCE X308-2 (incl. SIPLUS NET variant) All versions
o SCALANCE X308-2LD: All versions
o SCALANCE X308-2LH: All versions
o SCALANCE X308-2LH+: All versions
o SCALANCE X308-2M: All versions
o SCALANCE X308-2M POE: All versions
o SCALANCE X308-2M TS: All versions
o SCALANCE X310: All versions
o SCALANCE X310FE: All versions
o SCALANCE X320-1FE: All versions
o SCALANCE X320-3LDFE: All versions
o SCALANCE XB-200: All versions
o SCALANCE XC-200: All versions
o SCALANCE XF201-3P IRT: All versions prior to v5.5.0
o SCALANCE XF202-2P IRT: All versions prior to v5.5.0
o SCALANCE XF204: All versions
o SCALANCE XF204 IRT: All versions prior to v5.5.0
o SCALANCE XF204-2 (incl. SIPLUS NET variant): All versions
o SCALANCE XF204-2BA IRT: All versions prior to v5.5.0
o SCALANCE XF206-1: All versions
o SCALANCE XF208: All versions
o SCALANCE XF-200BA: All versions
o SCALANCE XM400: All versions prior to v6.3.1
o SCALANCE XP-200: All versions
o SCALANCE XR324-4M EEC: All versions
o SCALANCE XR324-4M POE: All versions
o SCALANCE XR324-4M POE TS: All versions
o SCALANCE XR324-12M: All versions
o SCALANCE XR324-12M TS: All versions
o SCALANCE XR500: All versions prior to v6.3.1
o SCALANCE XR-300WG: All versions
o SIMATIC CFU PA: All versions
o SIMATIC IE/PB-LINK V3: All versions
o SIMATIC MV500 family: All versions prior to v3.0
o SIMATIC NET CM 1542-1: All versions
o SIMATIC NET CP1616/CP1604: All Versions 2.7 and prior
o SIMATIC NET CP1626: All versions
o SIMATIC NET DK-16xx PN IO: All Versions 2.7 and prior
o SIMATIC Power Line Booster PLB, Base Module (MLFB: 6ES7972-5AA10-0AB0): All
versions
o SIMATIC PROFINET Driver: All versions
o SIMATIC S7-1200 CPU family (incl. SIPLUS variants): All versions prior to
v4.5
o SIMOCODE proV Ethernet/IP: All versions prior to v1.1.3
o SIMOCODE proV PROFINET: All versions prior to v2.1.3
o SOFTNET-IE PNIO: All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 ALLOCATION OF RESOURCES WITHOUT LIMITS OR THROTTLING CWE-770
Affected devices contain a vulnerability that allows an unauthenticated
attacker to trigger a denial-of-service condition. This vulnerability can be
triggered if a large amount of DCP resent packets are sent to the device.
CVE-2020-28400 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:N/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
4. MITIGATIONS
Siemens has provided remediations for the following affected products:
o RUGGEDCOM RM1224, All versions prior to v6.4: Update to v6.4 or later
version
o SCALANCE M-800, All versions prior to v6.4: Update to v6.4 or later version
o SCALANCE S615, All versions prior to v6.4: Update to v6.4 or later version
o SCALANCE X200-4 P IRT, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE X201-3P IRT, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE X201-3P IRT PRO, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE X202-2 IRT, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE X202-2P IRT (incl. SIPLUS NET variant), All versions prior to
v5.5.0: Update to v5.5.0 or later version
o SCALANCE X202-2P IRT PRO, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE X204 IRT, All versions prior to v5.5.0: Update to v5.5.0 or later
version
o SCALANCE X204 IRT PRO, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE XF201-3P IRT, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE XF202-2P IRT, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE XF204 IRT, All versions prior to v5.5.0: Update to v5.5.0 or later
version
o SCALANCE XF204-2BA IRT, All versions prior to v5.5.0: Update to v5.5.0 or
later version
o SCALANCE XM400, All versions prior to v6.3.1: Update to v6.3.1 or later
version
o SCALANCE XR500, All versions prior to v6.3.1: Update to v6.3.1 or later
version
o SIMATIC MV500 family, All versions prior to v3.0: Update to v3.0 or later
version
o SIMATIC S7-1200 CPU family (incl. SIPLUS variants), All versions prior to
v4.5: Update to v4.5 or later version
o SIMOCODE proV Ethernet/IP, All versions prior to v1.1.3: Update to v1.1.3
or later version
o SIMOCODE proV PROFINET, All versions prior to v2.1.3: Update to v2.1.3 or
later version
Siemens has also identified the following specific workarounds and mitigations
users can apply to reduce the risk:
o Block incoming PROFINET Discovery and Configuration Protocol (PCP) packets
(Ethertype 0x8892, Frame-ID: 0xfefe) from untrusted networks.
o Disable PROFINET in products, where PROFINET is optional and not used in
the environment.
As a general security measure, Siemens strongly recommends protecting network
access to devices with appropriate mechanisms. In order to operate the devices
in a protected IT environment, Siemens recommends configuring the environment
according to Siemens’ operational guidelines for Industrial Security , and to
follow the recommendations in the product manuals.
Additional information on Industrial security by Siemens can be found at:
https://www.siemens.com/industrialsecurity
For more information about this vulnerability and the associated remediations,
please see Siemens publication number SSA-599968
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.cisa.gov . Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
– ————————–END INCLUDED TEXT——————–
You have received this e-mail bulletin as a result of your organisation’s
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT’s members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation’s
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author’s website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
—–BEGIN PGP SIGNATURE—–
Comment: http://www.auscert.org.au/render.html?it=1967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=PCEc
—–END PGP SIGNATURE—–
The post ESB-2021.2401 – [Appliance] Siemens PROFINET Devices: Denial of service – Remote/unauthenticated appeared first on Malware Devil.
https://malwaredevil.com/2021/07/15/esb-2021-2401-appliance-siemens-profinet-devices-denial-of-service-remote-unauthenticated/?utm_source=rss&utm_medium=rss&utm_campaign=esb-2021-2401-appliance-siemens-profinet-devices-denial-of-service-remote-unauthenticated
No comments:
Post a Comment