Security Experts:

Severe Vulnerabilities Found in Meinberg NTP Servers

Germany-based time and frequency synchronization solutions provider Meinberg has released firmware updates for several of its NTP time servers to address three high severity vulnerabilities.

According to ICS-CERT, researcher Ryan Wincey discovered that the interface of Meinberg NTP time servers is plagued by two stack-based buffer overflows (CVE-2016-3962 and CVE-2016-3988) and a weak access control issue (CVE-2016-3989).

Remote attackers, even ones with low skill, can exploit the vulnerabilities to escalate their privileges to root, ICS-CERT warned. There is no evidence of exploits specifically designed to target these flaws.

The security holes affect Meinberg IMS-LANTIME M3000, M1000 and M500; LANTIME M100, M200, M300, M400, M600 and M900; SyncFire 1100; and LCES – products that are used worldwide in the defense, energy, telecommunications, transportation, financial services and other sectors.

The vulnerabilities impact version 6.0 and earlier of the firmware, and they have been addressed with the release of version 6.20.004. Wincey has confirmed that the issues have been properly fixed.

Related: Learn More at the ICS Cyber Security Conference

While Meinberg has not released a security advisory for the vulnerabilities identified by Wincey, the company has issued three advisories this year to inform customers about OpenSSL and NTP flaws affecting its products.

In May, at the Hack in the Box conference, researchers from China-based security firm Qihoo 360 warned that attackers can remotely change the time on NTP servers over long distances using inexpensive devices. The experts specifically named Meinberg’s Stratum 1 NTP servers as being vulnerable to such attacks.

ICS-CERT discloses flaws in Rockwell, Unitronics products

Separate advisories published this week by ICS-CERT describe vulnerabilities in Rockwell Automation and Unitronics products.

Rockwell has released firmware updates for its Allen-Bradley Stratix 5400 and 5410 industrial switches to address a resource management vulnerability (CVE-2016-1399). The flaw, which allows a remote attacker to corrupt packets, also affects Cisco’s Industrial Ethernet series 4000 and 5000 switches.

Unitronics updated VisiLogic, a tool designed for developing PLC and HMI applications for Vision and SAMBA controllers, to address a vulnerability that can be exploited by a remote attacker to execute arbitrary code.

Related Reading: Siemens Patches Vulnerabilities in Industrial Automation Products

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Eduard Kovacs (@EduardKovacs) is a contributing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.