Siemens has identified the following specific workarounds and mitigations:
#Simatic net pc software v8.1 update#
For SIMATIC WinCC v7.5: update to v7.5.1 Upd1 or higher.For SIMATIC WinCC v7.4: update to v7.4 SP1 Update 14 or higher.
For SIMATIC WinCC (TIA Portal) v16: update to v16 update 1 or higher. For SIMATIC WinCC (TIA Portal) v15.1: update to v15.1 Update 5 or later version. To obtain SIMATIC PCS 7 v8.2 SP1 contact your local support. SIMATIC PCS 7 v8.2: Update to v8.2 SP1 then update WinCC to v7.4 SP1 Update 14 or later version on the same system. SIMATIC NET PC Software v16: Update to v16 Update 1 or later. SIMATIC NET PC Software v14: Update to v14 SP1 Update 14 or later. For SIMATIC WinCC (TIA Portal) v14: update to v14 SP1 Update 10 or higher. For SIMATIC WinCC (TIA Portal) v13: update to v13 SP2 or higher. To obtain this update, contact Siemens customer service. For SIMATIC PCS 7 v9.0: update to v9.0 SP3 (Includes OpenPCS 7 v9.0 Upd3, SIMATIC Batch v9.0 Upd5, SIMATIC Route Control v9.0 Upd4). For SIMATIC NET PC Software: update to v16 update 1 or higher. Siemens is preparing further updates and recommends specific countermeasures until patches are available. Siemens has released updates for several affected products and recommends that customers update to the latest version(s). Nicholas Miles from Tenable reported this vulnerability to Siemens. CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy, Food and Agriculture, Water and Wastewater Systems. A CVSS v3 base score of 7.5 has been assigned the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Through specially crafted messages, when encrypted communication is enabled, an attacker with network access could compromise the availability of the system by causing a denial-of-service condition.ĬVE-2019-19282 has been assigned to this vulnerability. SIMATIC WinCC v7.5: all versions prior to v7.5.1 Upd1Ĥ.2 VULNERABILITY OVERVIEW 4.2.1 INCORRECT CALCULATION OF BUFFER SIZE CWE-131. SIMATIC WinCC v7.4: all versions prior to v7.4 SP1 Update 14. SIMATIC WinCC (TIA Portal) v16: all versions prior to v16 Update 1. SIMATIC WinCC (TIA Portal) v15.1: all versions prior to v15.1 Update 5. SIMATIC WinCC (TIA Portal) v14: all versions. 
SIMATIC WinCC (TIA Portal) v13: all versions prior to v13 SP2. SIMATIC Route Control v9.0: all versions prior to v9.0 Upd4. SIMATIC Route Control v8.2: all versions. SIMATIC Route Control v8.1: all versions. 
SIMATIC PCS 7 v9.0: all versions prior to v9.0 SP3.SIMATIC NET PC Software: all versions prior to v16 update 1.SIMATIC NET PC Software v16: All versions prior to v16 Update 1.SIMATIC NET PC Software v15: All versions.SIMATIC NET PC Software v14: All versions prior to v14 SP1 Update 14.SIMATIC BATCH v9.0: all versions prior to v9.0 SP1 Upd5.OpenPCS 7 v9.0: all versions prior to v9.0 Upd3.The following versions of SIMATIC software are affected: Successful exploitation of this vulnerability could allow an attacker with network access to cause a denial-of-service condition. This updated advisory is a follow-up to the advisory update titled 20-042-06 Siemens SIMATIC PCS 7, SIMATIC WinCC, and SIMATIC NET PC (Update F) that was published January 12, 2021, on the ICS webpage on 3. Vulnerability: Incorrect Calculation of Buffer Size.Equipment: SIMATIC PCS 7, SIMATIC WinCC, SIMATIC NET PC.ATTENTION: Exploitable remotely/low skill level to exploit.
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