DIFFICULTYĪn attacker with a low to moderate skill would be able to exploit these vulnerabilities. No known public exploits specifically target these vulnerabilities. Some will require additional user interaction. These vulnerabilities could be exploited remotely. A CVSS v2 base score of 7.8 has been assigned the CVSS vector string is (AV:N/AC:L/Au:N/C:N/I:N/A:C). A cold restart is required to recover the system. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEWĪn attacker could cause the device to go into defect mode, effectively causing a DoS, if specially crafted packets are sent to Port 102/TCP (ISO-TSAP). Products in the Siemens SIMATIC S7-1200 PLC family have been designed for discrete and continuous control in Critical Infrastructure Sectors such as Chemical, Critical Manufacturing, and Food and Agriculture. Siemens is a multinational company headquartered in Munich, Germany. ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation.
Impact to individual organizations depends on many factors that are unique to each organization. The vulnerabilities could be exploited over the network without authentication. The integrated web server may also be vulnerable to cross-site request forgery (CSRF) and privilege escalation.
The six vulnerabilities discovered in the SIMATIC S7-1200 CPU firmware may allow attackers to perform denial-of-service (DoS) attacks with specially crafted HTTP(S), ISO-TSAP, or Profinet network packets. SIMATIC S7-1200 CPU family, all versions prior to V4.0.The following SIMATIC S7-1200 versions are affected:
Siemens has produced a new product release that mitigates these vulnerabilities. Siemens, Ralf Spenneberg of OpenSource Training, Lucian Cojocar of EURECOM, Sascha Zinke from the FU Berlin’s work team SCADACS, and Positive Technologies’ researchers (Alexey Osipov, and Alex Timorin) have identified six vulnerabilities in the Siemens SIMATIC S7-1200 CPU family.
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