Rewterz Threat Advisory – ICS: Siemens IE/PB-Link, RUGGEDCOM, SCALANCE, SIMATIC, SINEMA Denial of Service Vulnerabilities

Severity

Medium

Analysis Summary

CVE-2018-5390

Certain Linux kernel versions can be forced to make resource intensive calls for every incoming packet, which can lead to a denial-of-service condition.

CVE-2018-5391

Certain Linux kernels are vulnerable to a denial-of-service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial-of-service condition by sending specially crafted IP fragments.

Impact

• Uncontrolled Resource Consumption
• Improper Input Validation
• Denial of service

Affected Vendors

Siemens

Affected Products

• IE/PB-Link v3 All versions
• RUGGEDCOM RM1224 All versions prior to 6.1
• RUGGEDCOM ROX II All versions prior to 2.13.3 (only affected by CVE-2018-5391)
• SCALANCE M-800 family All versions prior to 6.1
• SCALANCE S615 All versions prior to 6.1
• SCALANCE SC-600 All versions prior to 2.0
• SCALANCE W1700 IEEE 802.11ac All versions prior to 2.0
• SCALANCE W700 IEEE 802.11a/b/g/n All versions prior to 6.4
• SIMATIC CP 1242-7 All versions prior to 3.2
• SIMATIC CP 1243-1 (incl. SIPLUS NET variants) All versions prior to 3.2
• SIMATIC CP 1243-7 LTE EU All versions prior to 3.2
• SIMATIC CP 2243-7 LTE US: All versions prior to 3.2
• SIMATIC CP 1243-8 IRC: All versions prior to 3.2
• SIMATIC CP 1542SP-1 All versions prior to 2.1
• SIMATIC CP 1542SP-1 IRC (incl. SIPLUS NET variants) All versions prior to 2.1
• SIMATIC CP 1543SP-1 (incl. SIPLUS NET variants): All versions prior to 2.1
• SIMATIC RF185C: All versions
• SIMATIC RF186C All versions
• SINEMA Remote Connect Server: All versions newer than 1.1 and prior to 2.0.1

Remediation

Siemens recommends applying updates:

• RUGGEDCOM RM 1224: Update to v6.1
• RUGGEDCOM ROX II: Update to v2.13.3
• SCALANCE M-800 family: Update to v6.1
• SCALANCE S615: Update to v6.1
• SCALANCE SC-600: Update to v2.0 or later version
• SCALANCE W1700 IEEE 802.11 ac: Update to v2.0
• SCALANCE W700 IEEE 802.11a/b/g/n: Update to v6.4
• SIMATIC CP 1242-7 and 1243-1 (incl. SIPLUS NET variants): Update to v3.2
• SIMATIC CP 1243-7 LTE EU & US: Update to v3.2
• SIMATIC CP 1243-8 IRC: Update to v3.2
• SIMATIC CP 1542SP-1 and 1542SP-1 IRC (incl. SIPLUS NET variants): Update to v2.1
• SIMATIC 1543SP-1 IRC (incl. SIPLUS NET variants): Update to v2.1
• SIMATIC CP 1543-1 (incl. SIPLUS NET variants): Update to v2.2
• SIMATIC CP 1543SP-1 (incl. SIPLUS NET variants): Update to v2.1
• SINEMA Remote Connect Server: Update to v2.1