ICS Advisory (ICSA-19-085-01)

Siemens SCALANCE X (Update C)

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1. EXECUTIVE SUMMARY

  • CVSS v3 5.4
  • ATTENTION: Exploitable remotely
  • Vendor: Siemens
  • Equipment: SCALANCE X
  • Vulnerability: Expected Behavior Violation

2. UPDATE INFORMATION

This updated advisory is a follow-up to the advisory update titled ICSA-19-085-01 Siemens SCALANCE X (Update B) that was published January 14, 2020, to the ICS webpage on us-cert.gov.

3. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to feed data over a mirror port and into the mirrored network.

4. TECHNICAL DETAILS

4.1 AFFECTED PRODUCTS

The following SCALANCE products are affected:

--------- Begin Update C Part 1 of 2 --------

  • SCALANCE X204-2 (6GK5204-2BB10-2AA3): All versions
  • SCALANCE X204-2FM (6GK5204-2BB11-2AA3): All versions
  • SCALANCE X204-2LD (6GK5204-2BC10-2AA3): All versions
  • SCALANCE X204-2LD TS (6GK5204-2BC10-2CA2): All versions
  • SCALANCE X204-2TS (6GK5204-2BB10-2CA2): All versions
  • SCALANCE X206-1 (6GK5206-1BB10-2AA3): All versions
  • SCALANCE X206-1LD (6GK5206-1BC10-2AA3): All versions
  • SCALANCE X208 (6GK5208-0BA10-2AA3): All versions
  • SCALANCE X208PRO (6GK5208-0HA10-2AA6): All versions
  • SCALANCE X212-2 (6GK5212-2BB00-2AA3): All versions
  • SCALANCE X212-2LD (6GK5212-2BC00-2AA3): All versions
  • SCALANCE X216 (6GK5216-0BA00-2AA3): All versions
  • SCALANCE X224 (6GK5224-0BA00-2AA3): All versions
  • SCALANCE X302-7 EEC (2x 24V) (6GK5302-7GD00-2EA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (2x 24V, coated) (6GK5302-7GD00-2GA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (2x 230V) (6GK5302-7GD00-4EA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (2x 230V, coated) (6GK5302-7GD00-4GA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (24V) (6GK5302-7GD00-1EA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (24V, coated) (6GK5302-7GD00-1GA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (230V) (6GK5302-7GD00-3EA3): All versions prior to v4.1.3
  • SCALANCE X302-7 EEC (230V, coated) (6GK5302-7GD00-3GA3): All versions prior to v4.1.3
  • SCALANCE X304-2FE (6GK5304-2BD00-2AA3): All versions prior to v4.1.3
  • SCALANCE X306-1LD FE (6GK5306-1BF00-2AA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (2x 24V) (6GK5307-2FD00-2EA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (2x 24V, coated) (6GK5307-2FD00-2GA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (2x 230V) (6GK5307-2FD00-4EA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (2x 230V, coated) (6GK5307-2FD00-4GA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (24V) (6GK5307-2FD00-1EA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (24V, coated) (6GK5307-2FD00-1GA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (230V) (6GK5307-2FD00-3EA3): All versions prior to v4.1.3
  • SCALANCE X307-2 EEC (230V, coated) (6GK5307-2FD00-3GA3): All versions prior to v4.1.3
  • SCALANCE X307-3 (6GK5307-3BL00-2AA3): All versions prior to v4.1.3
  • SCALANCE X307-3 (6GK5307-3BL10-2AA3): All versions prior to v4.1.3
  • SCALANCE X307-3LD (6GK5307-3BM00-2AA3): All versions prior to v4.1.3
  • SCALANCE X307-3LD (6GK5307-3BM10-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2 (6GK5308-2FL00-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2 (6GK5308-2FL10-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2LD (6GK5308-2FM00-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2LD (6GK5308-2FM10-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2LH (6GK5308-2FN00-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2LH (6GK5308-2FN10-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2LH+ (6GK5308-2FP00-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2LH+ (6GK5308-2FP10-2AA3): All versions prior to v4.1.3
  • SCALANCE X308-2M (6GK5308-2GG00-2AA2): All versions prior to v4.1.3
  • SCALANCE X308-2M (6GK5308-2GG10-2AA2): All versions prior to v4.1.3
  • SCALANCE X308-2M PoE (6GK5308-2QG00-2AA2): All versions prior to v4.1.3
  • SCALANCE X308-2M PoE (6GK5308-2QG10-2AA2): All versions prior to v4.1.3
  • SCALANCE X308-2M TS (6GK5308-2GG00-2CA2): All versions prior to v4.1.3
  • SCALANCE X308-2M TS (6GK5308-2GG10-2CA2): All versions prior to v4.1.3
  • SCALANCE X310 (6GK5310-0FA00-2AA3): All versions prior to v4.1.3
  • SCALANCE X310 (6GK5310-0FA10-2AA3): All versions prior to v4.1.3
  • SCALANCE X310FE (6GK5310-0BA00-2AA3): All versions prior to v4.1.3
  • SCALANCE X310FE (6GK5310-0BA10-2AA3): All versions prior to v4.1.3
  • SCALANCE X320-1 FE (6GK5320-1BD00-2AA3): All versions prior to v4.1.3
  • SCALANCE X320-1-2LD FE (6GK5320-3BF00-2AA3): All versions prior to v4.1.3
  • SCALANCE X408-2 (6GK5408-2FD00-2AA2): All versions prior to v4.1.3
  • SCALANCE XB205-3 (SC) (6GK5205-3BD00-2AB2): All versions prior to v4.1
  • SCALANCE XB205-3 (SC) (6GK5205-3BD00-2TB2): All versions prior to v4.1
  • SCALANCE XB205-3 (ST/BFOC) (6GK5205-3BB00-2AB2): All versions prior to v4.1
  • SCALANCE XB205-3 (ST/BFOC) (6GK5205-3BB00-2TB2): All versions prior to v4.1
  • SCALANCE XB205-3LD (6GK5205-3BF00-2AB2): All versions prior to v4.1
  • SCALANCE XB205-3LD (6GK5205-3BF00-2TB2): All versions prior to v4.1
  • SCALANCE XB208 (6GK5208-0BA00-2AB2): All versions prior to v4.1
  • SCALANCE XB208 (6GK5208-0BA00-2TB2): All versions prior to v4.1
  • SCALANCE XB213-3 (SC) (6GK5213-3BD00-2AB2): All versions prior to v4.1
  • SCALANCE XB213-3 (SC) (6GK5213-3BD00-2TB2): All versions prior to v4.1
  • SCALANCE XB213-3 (ST/BFOC) (6GK5213-3BB00-2AB2): All versions prior to v4.1
  • SCALANCE XB213-3 (ST/BFOC) (6GK5213-3BB00-2TB2): All versions prior to v4.1
  • SCALANCE XB213-3LD (6GK5213-3BF00-2AB2): All versions prior to v4.1
  • SCALANCE XB213-3LD (6GK5213-3BF00-2TB2): All versions prior to v4.1
  • SCALANCE XB216 (6GK5216-0BA00-2AB2): All versions prior to v4.1
  • SCALANCE XB216 (6GK5216-0BA00-2TB2): All versions prior to v4.1
  • SCALANCE XC206-2 (SC) (6GK5206-2BD00-2AC2): All versions prior to v4.1
  • SCALANCE XC206-2 (ST/BFOC) (6GK5206-2BB00-2AC2): All versions prior to v4.1
  • SCALANCE XC206-2SFP (6GK5206-2BS00-2AC2): All versions prior to v4.1
  • SCALANCE XC206-2SFP EEC (6GK5206-2BS00-2FC2): All versions prior to v4.1
  • SCALANCE XC206-2SFP G (6GK5206-2GS00-2AC2): All versions prior to v4.1
  • SCALANCE XC206-2SFP G (6GK5206-2GS00-2TC2): All versions prior to v4.1
  • SCALANCE XC206-2SFP G EEC (6GK5206-2GS00-2FC2): All versions prior to v4.1
  • SCALANCE XC208 (6GK5208-0BA00-2AC2): All versions prior to v4.1
  • SCALANCE XC208EEC (6GK5208-0BA00-2FC2): All versions prior to v4.1
  • SCALANCE XC208G (6GK5208-0GA00-2AC2): All versions prior to v4.1
  • SCALANCE XC208G (6GK5208-0GA00-2TC2): All versions prior to v4.1
  • SCALANCE XC208G EEC (6GK5208-0GA00-2FC2): All versions prior to v4.1
  • SCALANCE XC216 (6GK5216-0BA00-2AC2): All versions prior to v4.1
  • SCALANCE XC216-4C (6GK5216-4BS00-2AC2): All versions prior to v4.1
  • SCALANCE XC216-4C G (6GK5216-4GS00-2AC2): All versions prior to v4.1
  • SCALANCE XC216-4C G (EIP Def.) (6GK5216-4GS00-2TC2): All versions prior to v4.1
  • SCALANCE XC216-4C G EEC (6GK5216-4GS00-2FC2): All versions prior to v4.1
  • SCALANCE XC216EEC (6GK5216-0BA00-2FC2): All versions prior to v4.1
  • SCALANCE XC224 (6GK5224-0BA00-2AC2): All versions prior to v4.1
  • SCALANCE XC224-4C G (6GK5224-4GS00-2AC2): All versions prior to v4.1
  • SCALANCE XC224-4C G (EIP Def.) (6GK5224-4GS00-2TC2): All versions prior to v4.1
  • SCALANCE XC224-4C G EEC (6GK5224-4GS00-2FC2): All versions prior to v4.1
  • SCALANCE XF204 (6GK5204-0BA00-2AF2): All versions
  • SCALANCE XF204 (6GK5204-0BA00-2GF2): All versions prior to v4.1
  • SCALANCE XF204 DNA (6GK5204-0BA00-2YF2): All versions prior to v4.1
  • SCALANCE XF204-2 (6GK5204-2BC00-2AF2): All versions
  • SCALANCE XF204-2BA (6GK5204-2AA00-2GF2): All versions prior to v4.1
  • SCALANCE XF204-2BA DNA (6GK5204-2AA00-2YF2): All versions prior to v4.1
  • SCALANCE XF206-1 (6GK5206-1BC00-2AF2): All versions
  • SCALANCE XF208 (6GK5208-0BA00-2AF2): All versions
  • SCALANCE XP208 (6GK5208-0HA00-2AS6): All versions prior to v4.1
  • SCALANCE XP208 (6GK5208-0HA00-2TS6): All versions prior to v4.1
  • SCALANCE XP208EEC (6GK5208-0HA00-2ES6): All versions prior to v4.1
  • SCALANCE XP208PoE EEC (6GK5208-0UA00-5ES6): All versions prior to v4.1
  • SCALANCE XP216 (6GK5216-0HA00-2AS6): All versions prior to v4.1
  • SCALANCE XP216 (6GK5216-0HA00-2TS6): All versions prior to v4.1
  • SCALANCE XP216EEC (6GK5216-0HA00-2ES6): All versions prior to v4.1
  • SCALANCE XP216POE EEC (6GK5216-0UA00-5ES6): All versions prior to v4.1
  • SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG00-2ER2): All versions prior to v4.1.3       
  • SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG10-2ER2): All versions prior to v4.1.3      
  • SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG00-2JR2): All versions prior to v4.1.3   
  • SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG10-2JR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front)(6GK5324-4GG00-4ER2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front)(6GK5324-4GG10-4ER2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear)(6GK5324-4GG00-4JR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear)(6GK5324-4GG10-4JR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG00-1ER2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG10-1ER2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG00-1JR2): All versions prior to v4.1.3       
  • SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG10-1JR2): All versions prior to V4.1.3       
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front)(6GK5324-4GG00-3ER2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front)(6GK5324-4GG10-3ER2): All versions prior to v4.1.3       
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG00-3JR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG10-3JR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (24V, ports on front) (6GK5 324-4QG10-1AR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (24V, ports on front) (6GK5324-4QG00-1AR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (24V, ports on rear) (6GK5 324-4QG10-1HR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (24V, ports on rear) (6GK5324-4QG00-1HR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (230V, ports on front) (6GK5 324-4QG10-3AR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (230V, ports on front) (6GK5324-4QG00-3AR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (230V, ports on rear) (6GK5 324-4QG10-3HR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE (230V, ports on rear) (6GK5324-4QG00-3HR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE TS (24V, ports on front) (6GK5 324-4QG10-1CR2): All versions prior to v4.1.3
  • SCALANCE XR324-4M PoE TS (24V, ports on front) (6GK5324-4QG00-1CR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG00-1AR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG10-1AR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG00-1HR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG10-1HR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG00-3AR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG10-3AR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG00-3HR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG10-3HR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M TS (24V) (6GK5324-0GG00-1CR2): All versions prior to v4.1.3
  • SCALANCE XR324-12M TS (24V) (6GK5324-0GG10-1CR2): All versions prior to v4.1.3
  • SCALANCE XR324WG (24 x FE, AC 230V) (6GK5324-0BA00-3AR3): All versions prior to v4.1
  • SCALANCE XR324WG (24 X FE, DC 24V) (6GK5324-0BA00-2AR3): All versions prior to v4.1
  • SCALANCE XR328-4C WG (24xFE,4xGE,AC230V) (6GK5328-4FS00-3AR3): All versions prior to v4.1
  • SCALANCE XR328-4C WG (24xFE,4xGE,AC230V) (6GK5328-4FS00-3RR3): All versions prior to v4.1
  • SCALANCE XR328-4C WG (24XFE, 4XGE, 24V) (6GK5328-4FS00-2AR3): All versions prior to v4.1
  • SCALANCE XR328-4C WG (24xFE, 4xGE,DC24V) (6GK5328-4FS00-2RR3): All versions prior to v4.1
  • SCALANCE XR328-4C WG (28xGE, AC 230V) (6GK5328-4SS00-3AR3): All versions prior to v4.1
  • SCALANCE XR328-4C WG (28xGE, DC 24V) (6GK5328-4SS00-2AR3): All versions prior to v4.1
  • SIPLUS NET SCALANCE X308-2 (6AG1308-2FL10-4AA3): All versions prior to v4.1.3
  • SIPLUS NET SCALANCE XC206-2 (6AG1206-2BB00-7AC2): All versions prior to v4.1
  • SIPLUS NET SCALANCE XC206-2SFP (6AG1206-2BS00-7AC2): All versions prior to v4.1
  • SIPLUS NET SCALANCE XC208 (6AG1208-0BA00-7AC2): All versions prior to v4.1
  • SIPLUS NET SCALANCE XC216-4C (6AG1216-4BS00-7AC2): All versions prior to v4.1

--------- End Update C Part 1 of 2 ----------

4.2 VULNERABILITY OVERVIEW

4.2.1    EXPECTED BEHAVIOR VIOLATION CWE-440

The monitor barrier of the affected products insufficiently blocks data from being forwarded over the mirror port and into the mirrored network. An attacker could exploit this vulnerability to transmit malicious packets to systems in the mirrored network to influence their configuration and runtime behavior.

This vulnerability could be exploited by an attacker with network access to the traffic-receiving network. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the confidentiality and availability of the traffic-generating network.

CVE-2019-6569 has been assigned to this vulnerability. A CVSS v3 base score of 5.4 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L).

4.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy, Food and Agriculture, and Water and Wastewater Systems
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

4.4 RESEARCHER

Siemens reported this vulnerability to CISA. Artem Zinenko of Kaspersky identified that SIPLUS is also affected.

5. MITIGATIONS

Siemens has provided the following specific updates that users can implement to mitigate this vulnerability:

--------- Begin Update C Part 2 of 2 --------

Users of the following products Update to v4.1.3

  • SCALANCE X302-7 EEC (2x 24V) (6GK5302-7GD00-2EA3)
  • SCALANCE X302-7 EEC (2x 24V, coated) (6GK5302-7GD00-2GA3)
  • SCALANCE X302-7 EEC (2x 230V) (6GK5302-7GD00-4EA3)
  • SCALANCE X302-7 EEC (2x 230V, coated) (6GK5302-7GD00-4GA3)
  • SCALANCE X302-7 EEC (24V) (6GK5302-7GD00-1EA3)
  • SCALANCE X302-7 EEC (24V, coated) (6GK5302-7GD00-1GA3)
  • SCALANCE X302-7 EEC (230V) (6GK5302-7GD00-3EA3)
  • SCALANCE X302-7 EEC (230V, coated) (6GK5302-7GD00-3GA3)
  • SCALANCE X304-2FE (6GK5304-2BD00-2AA3)
  • SCALANCE X306-1LD FE (6GK5306-1BF00-2AA3)
  • SCALANCE X307-2 EEC (2x 24V) (6GK5307-2FD00-2EA3)
  • SCALANCE X307-2 EEC (2x 24V, coated) (6GK5307-2FD00-2GA3)
  • SCALANCE X307-2 EEC (2x 230V) (6GK5307-2FD00-4EA3)
  • SCALANCE X307-2 EEC (2x 230V, coated) (6GK5307-2FD00-4GA3)
  • SCALANCE X307-2 EEC (24V) (6GK5307-2FD00-1EA3)
  • SCALANCE X307-2 EEC (24V, coated) (6GK5307-2FD00-1GA3)
  • SCALANCE X307-2 EEC (230V) (6GK5307-2FD00-3EA3)
  • SCALANCE X307-2 EEC (230V, coated) (6GK5307-2FD00-3GA3)
  • SCALANCE X307-3 (6GK5307-3BL00-2AA3)
  • SCALANCE X307-3 (6GK5307-3BL10-2AA3)
  • SCALANCE X307-3LD (6GK5307-3BM00-2AA3)
  • SCALANCE X307-3LD (6GK5307-3BM10-2AA3)
  • SCALANCE X308-2 (6GK5308-2FL00-2AA3)
  • SCALANCE X308-2 (6GK5308-2FL10-2AA3)
  • SCALANCE X308-2LD (6GK5308-2FM00-2AA3)
  • SCALANCE X308-2LD (6GK5308-2FM10-2AA3)
  • SCALANCE X308-2LH (6GK5308-2FN00-2AA3)
  • SCALANCE X308-2LH (6GK5308-2FN10-2AA3)
  • SCALANCE X308-2LH+ (6GK5308-2FP00-2AA3)
  • SCALANCE X308-2LH+ (6GK5308-2FP10-2AA3)
  • SCALANCE X308-2M (6GK5308-2GG00-2AA2)
  • SCALANCE X308-2M (6GK5308-2GG10-2AA2)
  • SCALANCE X308-2M PoE (6GK5308-2QG00-2AA2)
  • SCALANCE X308-2M PoE (6GK5308-2QG10-2AA2)
  • SCALANCE X308-2M TS (6GK5308-2GG00-2CA2)
  • SCALANCE X308-2M TS (6GK5308-2GG10-2CA2)
  • SCALANCE X310 (6GK5310-0FA00-2AA3)
  • SCALANCE X310 (6GK5310-0FA10-2AA3)
  • SCALANCE X310FE (6GK5310-0BA00-2AA3)
  • SCALANCE X310FE (6GK5310-0BA10-2AA3)
  • SCALANCE X320-1 FE (6GK5320-1BD00-2AA3)
  • SCALANCE X320-1-2LD FE (6GK5320-3BF00-2AA3)
  • SCALANCE X408-2 (6GK5408-2FD00-2AA2)
  • SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG00-2ER2)       
  • SCALANCE XR324-4M EEC (2x 24V, ports on front) (6GK5324-4GG10-2ER2)      
  • SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG00-2JR2)   
  • SCALANCE XR324-4M EEC (2x 24V, ports on rear) (6GK5324-4GG10-2JR2)
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front)(6GK5324-4GG00-4ER2)
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on front)(6GK5324-4GG10-4ER2)
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear)(6GK5324-4GG00-4JR2)
  • SCALANCE XR324-4M EEC (2x 100-240VAC/60-250VDC, ports on rear)(6GK5324-4GG10-4JR2)
  • SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG00-1ER2)
  • SCALANCE XR324-4M EEC (24V, ports on front) (6GK5324-4GG10-1ER2)
  • SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG00-1JR2)       
  • SCALANCE XR324-4M EEC (24V, ports on rear) (6GK5324-4GG10-1JR2)       
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front)(6GK5324-4GG00-3ER2)
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on front)(6GK5324-4GG10-3ER2)       
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG00-3JR2)
  • SCALANCE XR324-4M EEC (100-240VAC/60-250VDC, ports on rear) (6GK5324-4GG10-3JR2)
  • SCALANCE XR324-4M PoE (24V, ports on front) (6GK5 324-4QG10-1AR2)
  • SCALANCE XR324-4M PoE (24V, ports on front) (6GK5324-4QG00-1AR2)
  • SCALANCE XR324-4M PoE (24V, ports on rear) (6GK5 324-4QG10-1HR2)
  • SCALANCE XR324-4M PoE (24V, ports on rear) (6GK5324-4QG00-1HR2)
  • SCALANCE XR324-4M PoE (230V, ports on front) (6GK5 324-4QG10-3AR2)
  • SCALANCE XR324-4M PoE (230V, ports on front) (6GK5324-4QG00-3AR2)
  • SCALANCE XR324-4M PoE (230V, ports on rear) (6GK5 324-4QG10-3HR2)
  • SCALANCE XR324-4M PoE (230V, ports on rear) (6GK5324-4QG00-3HR2)
  • SCALANCE XR324-4M PoE TS (24V, ports on front) (6GK5 324-4QG10-1CR2)
  • SCALANCE XR324-4M PoE TS (24V, ports on front) (6GK5324-4QG00-1CR2)
  • SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG00-1AR2)
  • SCALANCE XR324-12M (24V, ports on front) (6GK5324-0GG10-1AR2)
  • SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG00-1HR2)
  • SCALANCE XR324-12M (24V, ports on rear) (6GK5324-0GG10-1HR2)
  • SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG00-3AR2)
  • SCALANCE XR324-12M (230V, ports on front) (6GK5324-0GG10-3AR2)
  • SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG00-3HR2)
  • SCALANCE XR324-12M (230V, ports on rear) (6GK5324-0GG10-3HR2)
  • SCALANCE XR324-12M TS (24V) (6GK5324-0GG00-1CR2)
  • SCALANCE XR324-12M TS (24V) (6GK5324-0GG10-1CR2)
  • SIPLUS NET SCALANCE X308-2 (6AG1308-2FL10-4AA3)

Users of the following products update to v4.1 or later

  • SCALANCE XB205-3 (SC) (6GK5205-3BD00-2AB2)
  • SCALANCE XB205-3 (SC) (6GK5205-3BD00-2TB2)
  • SCALANCE XB205-3 (ST/BFOC) (6GK5205-3BB00-2AB2)
  • SCALANCE XB205-3 (ST/BFOC) (6GK5205-3BB00-2TB2)
  • SCALANCE XB205-3LD (6GK5205-3BF00-2AB2)
  • SCALANCE XB205-3LD (6GK5205-3BF00-2TB2)
  • SCALANCE XB208 (6GK5208-0BA00-2AB2)
  • SCALANCE XB208 (6GK5208-0BA00-2TB2)
  • SCALANCE XB213-3 (SC) (6GK5213-3BD00-2AB2)
  • SCALANCE XB213-3 (SC) (6GK5213-3BD00-2TB2)
  • SCALANCE XB213-3 (ST/BFOC) (6GK5213-3BB00-2AB2)
  • SCALANCE XB213-3 (ST/BFOC) (6GK5213-3BB00-2TB2)
  • SCALANCE XB213-3LD (6GK5213-3BF00-2AB2)
  • SCALANCE XB213-3LD (6GK5213-3BF00-2TB2)
  • SCALANCE XB216 (6GK5216-0BA00-2AB2)
  • SCALANCE XB216 (6GK5216-0BA00-2TB2)
  • SCALANCE XC206-2 (SC) (6GK5206-2BD00-2AC2)
  • SCALANCE XC206-2 (ST/BFOC) (6GK5206-2BB00-2AC2)
  • SCALANCE XC206-2SFP (6GK5206-2BS00-2AC2)
  • SCALANCE XC206-2SFP EEC (6GK5206-2BS00-2FC2)
  • SCALANCE XC206-2SFP G (6GK5206-2GS00-2AC2)
  • SCALANCE XC206-2SFP G (6GK5206-2GS00-2TC2)
  • SCALANCE XC206-2SFP G EEC (6GK5206-2GS00-2FC2)
  • SCALANCE XC208 (6GK5208-0BA00-2AC2)
  • SCALANCE XC208EEC (6GK5208-0BA00-2FC2)
  • SCALANCE XC208G (6GK5208-0GA00-2AC2)
  • SCALANCE XC208G (6GK5208-0GA00-2TC2)
  • SCALANCE XC208G EEC (6GK5208-0GA00-2FC2)
  • SCALANCE XC216 (6GK5216-0BA00-2AC2)
  • SCALANCE XC216-4C (6GK5216-4BS00-2AC2)
  • SCALANCE XC216-4C G (6GK5216-4GS00-2AC2)
  • SCALANCE XC216-4C G (EIP Def.) (6GK5216-4GS00-2TC2)
  • SCALANCE XC216-4C G EEC (6GK5216-4GS00-2FC2)
  • SCALANCE XC216EEC (6GK5216-0BA00-2FC2)
  • SCALANCE XC224 (6GK5224-0BA00-2AC2)
  • SCALANCE XC224-4C G (6GK5224-4GS00-2AC2)
  • SCALANCE XC224-4C G (EIP Def.) (6GK5224-4GS00-2TC2)
  • SCALANCE XC224-4C G EEC (6GK5224-4GS00-2FC2)
  • SCALANCE XF204 (6GK5204-0BA00-2GF2)
  • SCALANCE XF204 DNA (6GK5204-0BA00-2YF2)
  • SCALANCE XF204-2BA (6GK5204-2AA00-2GF2)
  • SCALANCE XF204-2BA DNA (6GK5204-2AA00-2YF2)
  • SCALANCE XP208 (6GK5208-0HA00-2AS6)
  • SCALANCE XP208 (6GK5208-0HA00-2TS6)
  • SCALANCE XP208EEC (6GK5208-0HA00-2ES6)
  • SCALANCE XP208PoE EEC (6GK5208-0UA00-5ES6)
  • SCALANCE XP216 (6GK5216-0HA00-2AS6)
  • SCALANCE XP216 (6GK5216-0HA00-2TS6)
  • SCALANCE XP216EEC (6GK5216-0HA00-2ES6)
  • SCALANCE XP216POE EEC (6GK5216-0UA00-5ES6)
  • SCALANCE XR324WG (24 x FE, AC 230V) (6GK5324-0BA00-3AR3)
  • SCALANCE XR324WG (24 X FE, DC 24V) (6GK5324-0BA00-2AR3)
  • SCALANCE XR328-4C WG (24xFE,4xGE,AC230V) (6GK5328-4FS00-3AR3)
  • SCALANCE XR328-4C WG (24xFE,4xGE,AC230V) (6GK5328-4FS00-3RR3)
  • SCALANCE XR328-4C WG (24XFE, 4XGE, 24V) (6GK5328-4FS00-2AR3)
  • SCALANCE XR328-4C WG (24xFE, 4xGE,DC24V) (6GK5328-4FS00-2RR3)
  • SCALANCE XR328-4C WG (28xGE, AC 230V) (6GK5328-4SS00-3AR3)
  • SCALANCE XR328-4C WG (28xGE, DC 24V) (6GK5328-4SS00-2AR3)
  • SIPLUS NET SCALANCE XC206-2 (6AG1206-2BB00-7AC2)
  • SIPLUS NET SCALANCE XC206-2SFP (6AG1206-2BS00-7AC2)
  • SIPLUS NET SCALANCE XC208 (6AG1208-0BA00-7AC2)
  • SIPLUS NET SCALANCE XC216-4C (6AG1216-4BS00-7AC2)

Siemens has identified the following specific workarounds/mitigation users can implement to reduce the risk:

  • Make sure that no devices that transmit data back into the mirroring network are operated within the mirrored network.

--------- End Update C Part 2 of 2 ----------

Siemens has identified the following specific workarounds/mitigation that users can implement to reduce the risk:

  • Apply defense in depth principles, particularly ensuring that no devices that transmit data back in the mirroring network are operated within the mirrored network.

As a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens’ operational guidelines for Industrial Security, and follow the recommendations in the product manuals.

Additional information on industrial security by Siemens is available at: https://www.siemens.com/industrialsecurity

For further inquiries on security vulnerabilities in Siemens products and solutions, please contact Siemens.

For more information on this vulnerability and more detailed mitigation instructions, please see Siemens Security Advisory SSA-557804

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

  • Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
  • Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
  • When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its 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.

This vulnerability requires high skill level to exploit. No known public exploits specifically target this vulnerability.


Contact Information

For any questions related to this report, please contact the CISA at:

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  https://us-cert.cisa.gov/ics 
or incident reporting:  https://us-cert.cisa.gov/report

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