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CVSS: 5.3EPSS: 0%CPEs: 2EXPL: 1

An exploitable insufficient resource pool vulnerability exists in the session communication functionality of Allen Bradley Micrologix 1400 Series B Firmware 21.2 and before. A specially crafted stream of packets can cause a flood of the session resource pool resulting in legitimate connections to the PLC being disconnected. An attacker can send unauthenticated packets to trigger this vulnerability. Existe una vulnerabilidad explotable de denegación de servicio (DoS) en la funcionalidad de comunicación de sesión de Allen Bradley Micrologix 1400 Series B Firmware, en versiones 21.2 y anteriores. Un flujo de paquetes especialmente manipulado puede provocar la inundación del pool de recursos de sesión que resulta en conexiones legítimas al PCL que se está desconectando. • https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0445 • CWE-400: Uncontrolled Resource Consumption •

CVSS: 10.0EPSS: 0%CPEs: 2EXPL: 1

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a read or write operation resulting in disclosure of sensitive information, modification of settings, or modification of ladder logic. An attacker can send unauthenticated packets to trigger this vulnerability. Required Keyswitch State: REMOTE or PROG Associated Fault Codes: 0023, 002e, and 0037 Fault Type: Recoverable Description: The STI, EII, and HSC function files contain bits signifying whether or not a fault has occurred. Additionally there is a bit signaling the module to auto start. • https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0443 •

CVSS: 10.0EPSS: 0%CPEs: 2EXPL: 1

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a read or write operation resulting in disclosure of sensitive information, modification of settings, or modification of ladder logic. An attacker can send unauthenticated packets to trigger this vulnerability. Required Keyswitch State: Any Description: Requests a specific set of bytes from an undocumented data file and returns the ASCII version of the master password. Existe una vulnerabilidad explotable de control de acceso en las funcionalidades data, program y function file de Allen Bradley Micrologix 1400 Series B FRN, en versiones 21.2 y anteriores. • https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0443 •

CVSS: 10.0EPSS: 0%CPEs: 2EXPL: 1

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a read or write operation resulting in disclosure of sensitive information, modification of settings, or modification of ladder logic. An attacker can send unauthenticated packets to trigger this vulnerability. Required Keyswitch State: REMOTE or PROG Associated Fault Code: 0028 Fault Type: Non-User Description: Values 0x01 and 0x02 are invalid values for the user fault routine. By writing directly to the file it is possible to set these values. • https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0443 •

CVSS: 10.0EPSS: 0%CPEs: 2EXPL: 1

An exploitable access control vulnerability exists in the data, program, and function file permissions functionality of Allen Bradley Micrologix 1400 Series B FRN 21.2 and before. A specially crafted packet can cause a read or write operation resulting in disclosure of sensitive information, modification of settings, or modification of ladder logic. An attacker can send unauthenticated packets to trigger this vulnerability. Required Keyswitch State: REMOTE or PROG or RUN Description: The value 0xffffffff is considered NaN for the Float data type. When a float is set to this value and used in the PLC, a fault is triggered. • https://www.talosintelligence.com/vulnerability_reports/TALOS-2017-0443 •