Schneider Electric has new software to mitigate multiple vulnerabilities in its Floating License Manager, according to a report with NCCIC.
The remotely exploitable vulnerabilities which Schneider self-reported include a heap-based buffer overflow, improper restriction of operations within the bounds of a memory buffer, and an open redirect
Successful exploitation of these vulnerabilities could cause a denial of service, allow arbitrary execution of code with system level privileges, or send users to arbitrary websites.
The following products use the vulnerable Schneider Electric Floating License Manager, a license management platform:
• SCADA Expert Vijeo Citect/CitectSCADA Version 7.30, 7.40
• CitectSCADA Version 2015, 2016
• Vijeo Historian/CitectHistorian Version 4.40, 4.50
• CitectHistorian Version 2016
• Citect Anywhere
• PlantStruxure PES V4.3 SP1 and prior
• EcoStruxure Modicon Builder V3.0 and prior
The following products are only affected by CVE-2016-10395:
• EcoStruxure Power Monitoring Expert 8.2 (Standard, DC, HC Editions)
• StruxureWare Power Monitoring Expert 8.1 (Standard, DC, HC Editions)
• StruxureWare Power Monitoring Expert 8.0 (Standard, DC, HC, Buildings Editions)
• StruxureWare Power Monitoring Expert 7.2.x
• Energy Expert 1.x (formerly Power Manager)
• EcoStruxure Power SCADA Operations 8.x (formerly PowerSCADA Expert) (Only with Advanced Reports and Dashboards Module)
In one vulnerability, OpenSSL incorrectly uses pointer arithmetic for heap-buffer boundary checks, which may allow denial of service attacks or other unspecified behavior.
CVE-2016-2177 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 9.8.
The improper restriction of operations within the bounds of a memory buffer vulnerability can end up exploited to cause an out-of-bounds memory read access, which may allow remote code execution with system privileges.
CVE-2016-10395 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 7.8.
Also, an open redirect vulnerability has been identified, which may allow remote attackers to redirect users to arbitrary websites for phishing attacks.
CVE-2017-5571 is the case number assigned to this vulnerability, which has a CVSS v3 base score of 6.1.
The products see use in the commercial facilities, energy, food and agriculture, government facilities, transportation systems, and water and wastewater systems sectors. They also see action on a global basis.
No known public exploits specifically target these vulnerabilities. However, an attacker with low skill level could leverage the vulnerability.
Schneider recommends users of affected Citect and PlantStruxure products download and install the new version of the software.
Those using EcoStruxure Modicon Builder V3.0 are recommended to download and use the new version (V3.1) (login required).
StructureWare 7.2.x users should upgrade to Version 7.2.2 and apply the floating licensing manager (FLM) patch.
EcoStruxure/StruxureWare Power Monitoring Expert and Power SCADA Operations users need to upgrade to Version 8.2. Energy Expert users need to upgrade to Version 1.3. Once these are upgraded apply the Cumulative Update (CU) 2.
Schneider Electric has also released security notifications which contain further details and upgrade instructions.