Allen Bradley MicroLogix 1400 up to 21.2 Crafted Packet access control

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability has been found in Allen Bradley MicroLogix 1400 up to 21.2 and classified as critical. This vulnerability affects some unknown functionality. The manipulation as part of a Crafted Packet leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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: 0001 Fault Type: Non-User Description: A fault state can be triggered by setting the NVRAM/memory module user program mismatch bit (S2:9) when a memory module is NOT installed.

The bug was discovered 03/28/2018. The weakness was disclosed 04/05/2018 (Website). The advisory is shared for download at This vulnerability was named CVE-2017-14464 since 09/13/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 10.0
CNA Vector (Talos): 🔍



VulDB Base Score: 🔍
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Class: Access control
CWE: CWE-284 / CWE-266

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Price Prediction: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


09/13/2017 🔍
03/28/2018 +196 days 🔍
04/05/2018 +8 days 🔍
04/05/2018 +0 days 🔍
04/06/2018 +1 days 🔍
02/27/2023 +1788 days 🔍


Status: Not defined

CVE: CVE-2017-14464 (🔍)


Created: 04/06/2018 09:00 AM
Updated: 02/27/2023 08:32 AM
Changes: 04/06/2018 09:00 AM (58), 01/22/2020 03:13 PM (1), 02/27/2023 08:32 AM (14)
Complete: 🔍
Cache ID: 34:43A:40


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