Kaspersky Lab publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky Lab does not make any guarantees in respect of information received from vendors of products in which vulnerabilities have been identified, which is included in the following sections of the advisory: Affected Products, Vendor Mitigation.
|Researcher||Yury Serdyuk, Kaspersky Lab|
|Description||Neither communication encryption nor user authentication is activated by default, but must be activated by the user.|
|Impact||Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code.|
|CVSS v3 Base Score:||9.8|
|Existence of exploit||Unknown|
|Affected products||All variants of the following CODESYS V3 products in all versions prior to V220.127.116.11 containing the CmpSecureChannel or CmpUserMgr component are affected, regardless of the CPU type or the operating system:
|Vendor mitigation||This issue is resolved in two steps to allow communication clients other than the CODESYS Development system to find a compatible update strategy.
In version V18.104.22.168 of the affected products, which has already been released, the CODESYS development system enables communication and user management policies in affected products to be configured online by the CODESYS development system. In the communication settings dialog of the CODESYS development system, where the path to the PLC is configured, there is a clearly visible link to CODESYS online help explaining the technical background and reminding the user to activate these features.
This allows customers to activate and enforce communication encryption and user management.
The second step will involve activating both features by default in version V22.214.171.124 of the affected products.
Version V126.96.36.199 is expected to be released in July 2019.
Encryption of online communication and online user management has been available in CODESYS Control runtime systems in several service packs already released for the affected products. Depending on the PLC runtime system, these features can be activated either by the user or by the control system’s manufacturer only. Further information on activating encrypted communication and user management can be found in CODESYS online help.
In general, 3S-Smart Software Solutions GmbH recommends the following defensive measures as part of the mitigation strategy to reduce the risk of exploitation of this vulnerability:
|Timeline||Jun 2018 – Vulnerabilities reported
Dec 2018 – Vendor releases patch
Dec 2018 – Advisory published