Allen Bradley MicroLogix 1400 up to 21.2 File Permission Crafted Packet access control

Summaryinfo

A vulnerability marked as critical has been reported in Allen Bradley MicroLogix 1400 up to 21.2. This impacts an unknown function of the component File Permission. This manipulation as part of Crafted Packet causes access control. This vulnerability is handled as CVE-2017-14473. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Allen Bradley MicroLogix 1400 up to 21.2 and classified as critical. Affected by this vulnerability is an unknown code of the component File Permission. 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. The summary by CVE is:

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: Reads the encoded ladder logic from its data file and print it out in HEX.

The bug was discovered 03/28/2018. The weakness was released 04/05/2018 (Website). The advisory is shared at talosintelligence.com. This vulnerability is known as CVE-2017-14473 since 09/13/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

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.

Entries connected to this vulnerability are available at VDB-115850, VDB-115851, VDB-115852 and VDB-115853. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Allen Bradley

Name

• MicroLogix 1400

Version

• 21.0
• 21.1
• 21.2

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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