| Article No° | Product Name | Affected Version(s) |
|---|---|---|
| 574415 | Controller CECC-D | = R07 (07.06.2021) = 2.4.2.0 |
| 574418 | Controller CECC-LK | = R07 (07.06.2021) = 2.4.2.0 |
| 574416 | Controller CECC-S | = R07 (07.06.2021) = 2.4.2.0 |
The Festo controller CECC product family in firmware version 2.4.2.0 is affected by multiple vulnerabilities in the CODESYS V3 runtime.
CODESYS V3 web server before 3.5.15.40, as used in CODESYS Control runtime systems, has a buffer overflow.
CODESYS Control Runtime system before 3.5.17.10 has a Heap-based Buffer Overflow.
An issue was discovered in 3S-Smart CODESYS V3 products. The application may utilize non-TLS based encryption, which results in user credentials being insufficiently protected during transport. All variants of the following CODESYS V3 products in all versions containing the CmpUserMgr component are affected regardless of the CPU type or operating system: CODESYS Control for BeagleBone, CODESYS Control for emPC-A/iMX6, CODESYS Control for IOT2000, CODESYS Control for Linux, CODESYS Control for PFC100, CODESYS Control for PFC200, CODESYS Control for Raspberry Pi, CODESYS Control RTE V3, CODESYS Control RTE V3 (for Beckhoff CX), CODESYS Control Win V3 (also part of the CODESYS Development System setup), CODESYS V3 Simulation Runtime (part of the CODESYS Development System), CODESYS Control V3 Runtime System Toolkit, CODESYS HMI V3.
A remote, authenticated attacker could utilize the control program of the CODESYS Control runtime system to use the vulnerability in order to read and modify the configuration file(s) of the affected products.
In CODESYS V3 web server before 3.5.17.10, files or directories are accessible to External Parties.
In CODESYS Gateway V3 before 3.5.17.10, there is a NULL Pointer Dereference. Crafted communication requests may cause a Null pointer dereference in the affected CODESYS products and may result in a denial-of-service condition.
The CODESYS web server is used by the CODESYS WebVisu to display CODESYS visualization screens in a web browser. Specific crafted HTTP or HTTPS requests may cause an internal buffer over-read, which could crash the web server task of the CODESYS Control runtime system.
An unauthenticated, remote attacker can disrupt existing communication channels between CODESYS products by guessing a valid channel ID and injecting packets. This results in the communication channel to be closed.
CODESYS Control runtime system before 3.5.16.10 allows Uncontrolled Memory Allocation.
An exploitable memory corruption vulnerability exists in the Name Service Client functionality of 3S-Smart Software Solutions CODESYS GatewayService. A specially crafted packet can cause a large memcpy, resulting in an access violation and termination of the process. An attacker can send a packet to a device running the GatewayService.exe to trigger this vulnerability. All variants of the CODESYS V3 products in all versions prior V3.5.16.10 containing the CmpRouter or CmpRouterEmbedded component are affected, regardless of the CPU type or operating system: CODESYS Control for BeagleBone, CODESYS Control for emPC-A/iMX6, CODESYS Control for IOT2000, CODESYS Control for Linux, CODESYS Control for PLCnext, CODESYS Control for PFC100, CODESYS Control for PFC200, CODESYS Control for Raspberry Pi, CODESYS Control RTE V3, CODESYS Control RTE V3 (for Beckhoff CX), CODESYS Control Win V3 (also part of the CODESYS Development System setup), CODESYS Control V3 Runtime System Toolkit, CODESYS V3 Embedded Target Visu Toolkit, CODESYS V3 Remote Target Visu Toolkit, CODESYS V3 Safety SIL2, CODESYS Edge Gateway V3, CODESYS Gateway V3, CODESYS HMI V3, CODESYS OPC Server V3, CODESYS PLCHandler SDK, CODESYS V3 Simulation Runtime (part of the CODESYS Development System).
CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.
An authenticated, remote attacker can gain access to a dereferenced pointer contained in a request. The accesses can subsequently lead to local overwriting of memory in the CmpTraceMgr, whereby the attacker can neither gain the values read internally nor control the values to be written. If invalid memory is accessed, this results in a crash.
An authenticated remote attacker can cause a null pointer dereference in the CmpSettings component of the affected CODESYS products which leads to a crash.
An issue was discovered in CODESYS Development System before 3.5.16.0. CODESYS WebVisu and CODESYS Remote TargetVisu are susceptible to privilege escalation.
The hashing procedure used to save passwords is inadequate.
This vulnerability enables valid user names to be identified.
The user password can be changed without having to enter the original password.
By using the listed vulnerabilities an unauthorized remote attacker may gain full access to the devices or make them unavailable.
Remediation
No fix planned. This issue will be handled with next hardware generation release.
General recommendations
Festo strongly recommends to minimize and protect network access to connected devices with state of the art techniques and processes.
Festo also highly recommends to apply available firmware updates containig security related changes as soon as possible.
For a secure operation follow the recommendations in the product manuals.
Until Festo provides a firmware-update with CODESYS runtime patching the vulnerabilities general recommendation is to:
As part of a security strategy, Festo supports the CODESYS GmbH recommended following general defense measures to reduce the risk of exploits:
For more information and general recommendations for protecting machines and plants, see also the CODESYS Security Whitepaper: customers.codesys.com/fileadmin/data/customers/security/CODESYS-Security-Whitepaper.pdf
Festo SE & Co. KG thanks the following parties for their efforts: