CVE-2017-14471 Missing authorization in Allen Bradley
An attacker can send unauthenticated packets to read or write sensitive data and modify ladder logic on Allen Bradley Micrologix PLCs when in specific keyswitch states.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-14471?
CVE-2017-14471 is a critical missing authorization vulnerability in Talos Allen Bradley, published on 5 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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. When these bits are set for any of the three modules and the device is moved into a run state, a fault is triggered.
Which versions are affected by CVE-2017-14471?
It affects 1 product.
Products include Rockwellautomation Micrologix 1400 B Firmware.
How do I fix CVE-2017-14471?
No fix has been published for CVE-2017-14471 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2017-14471 being exploited?
There is no known exploitation of CVE-2017-14471 in the wild and no public exploit code.
Other vulnerabilities in Talos Allen Bradley
Sources
Also known as GHSA-wxm8-9g6p-x55h.