PLCnext Control AXC F x152 is certified according to IEC 62443-4-1 and IEC 62443-4-2.
This certification requires that all third-party components used in the firmware are regularly checked for known vulnerabilities.
Firmware components in version 2021.06 had already been updated. For the 2022.0 LTS version more firmware components have been updated implicitly fixing the vulnerabilities listed. The vulnerabilities listed above have not been individually verified in terms of actual impact and/or limitations in combination with the affected products listed. The current LTS release 2022.0 LTS contains updates of integrated third-party libraries, SDKs and other third-party software to address these issues nevertheless.
UPDATE A (April 4th, 2022): Added RFC 4072 (Art. No. 1051328) and fixed affected version of AXC F 3152
Multiple issues have been found in the affected products. See CVE descriptions for details.
The Linux kernel starting from 5.8 has a flaw which can lead to privilege escalation for a local user. The kernel is used in several Versions of the FW of several WAGO products. All vulnerable PLCs are listed in chapter ‘Affected Products’.
Several vulnerabilities have been discovered in the Expat XML parser library (aka libexpat).
This open-source component is widely used in a lot of products worldwide.
A remote, anonymous attacker could use an integer overflow to execute arbitrary program code when loading specially crafted XML files.
Profinet SDK is using XML parser library Expat as reference solution for loading the XML based Profinet network configuration files (IPPNIO or TIC).
Possible memory corruption in BT controller when it receives an oversized LMP packet over 2-DH1 link and leads to denial of service.
SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry ../evil.txt may be extracted in the parent directory of destFolder. This leads to arbitrary file write that may lead to code execution. The vulnerability was fixed in SharpZipLib version 1.3.3.
The Web-Based Management (WBM) of WAGOs programmable logic controller (PLC) is typically used for administration, commissioning and updates.
Various configuration pages of the device are vulnerable to reflected XSS (Cross-Site Scripting) attacks.
By tricking clients of the mentioned products into contacting malicious OPC UA servers and thereby acting as OPC UA clients, a crash of the component can be provoked.