Team82 has developed a novel technique called the Evil PLC Attack in which programmable logic controllers (PLCs) are weaponized and used to compromise engineering workstations. An attacker with a foothold on an engineering workstation can have access to anything else on the OT network to which an engineer connects that machine, including other PLCs.
CWE-120 BUFFER COPY WITHOUT CHECKING SIZE OF INPUT ('CLASSIC BUFFER OVERFLOW'):
A denial-of-service vulnerability exists in the affected product. The vulnerability results in a buffer overflow, potentially causing denial-of-service condition.
Rockwell Automation has corrected these problems in firmware revision 4.020 and recommends users upgrade to the latest version available.
CVSS v3: 9.8
CWE-122 HEAP-BASED BUFFER OVERFLOW:
A denial-of-service and possible remote code execution vulnerability exists in the affected product. The vulnerability results in the corruption of the heap memory, which may compromise the integrity of the system, potentially allowing for remote code execution or a denial-of-service attack.
Rockwell Automation has corrected these problems in firmware revision 4.020 and recommends users upgrade to the latest version available.
CVSS v3: 9.8
CWE-420 UNPROTECTED ALTERNATE CHANNEL:
A device takeover vulnerability exists in the affected product. This vulnerability allows configuration of a new Policyholder user without any authentication via API. Policyholder user is the most privileged user that can perform edit operations, creating admin users and performing factory reset.
Rockwell Automation has corrected these problems in firmware revision 4.020 and recommends users upgrade to the latest version available.
CVSS v3: 9.8
CWE-191 INTEGER UNDERFLOW (WRAP OR WRAPAROUND):
The affected product is vulnerable to an integer underflow. An unauthenticated attacker could send a malformed HTTP Requesty, which could allow the attacker to crash the program.
Planet Technology recommends users upgrade to version 1.305b241111 or later.
CVSS v3: 5.3
CWE-78 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION'):
The affected product is vulnerable to a command injection. An unauthenticated attacker could send commands through a malicious HTTP request which could result in remote code execution.
Planet Technology recommends users upgrade to version 1.305b241111 or later.
CVSS v3: 9.8
