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Siemens Patches Several Critical Flaws in SINUMERIK Controllers

Siemens informed customers this week that its SINUMERIK controllers are affected by denial-of-service (DoS), privilege escalation and code execution vulnerabilities, including several flaws that have been classified as “critical.”

Researchers at Kaspersky Lab discovered that SINUMERIK 808D, 828D and 840D controllers – some of which have been discontinued – are affected by ten vulnerabilities.

The most serious of the flaws, based on its CVSS score of 10, is CVE-2018-11466, which allows an attacker on the network to cause a DoS condition on the integrated software firewall or execute arbitrary code in the context of the firewall by sending specially crafted packets to TCP port 102. The security hole can be exploited by an unauthenticated attacker with no user interaction.

Another critical flaw, CVE-2018-11457, affects the integrated web server and it can be exploited by a network attacker with access to TCP port 4842 to execute code with elevated privileges by sending...(continued)

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