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CVE-2017-16740: A Buffer Overflow issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers…

CVE-2017-16740 is rated critical with a CVSS v3.0 base score of 10.0 and NVD lists 6 affected products, including Rockwellautomation 1766 L32bxba Firmware. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

A Buffer Overflow issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1400 Controllers, Series B and C Versions 21.002 and earlier. The stack-based buffer overflow vulnerability has been identified, which may allow remote code execution.

Severity breakdown

CVSS v3.0 10.0: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-120: Buffer Copy without Checking Size of Input

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.

Affected products

  • Rockwellautomation 1766 L32bxba Firmware: up to and including 21.002
  • Rockwellautomation 1766 L32awa Firmware: up to and including 21.002
  • Rockwellautomation 1766 L32bxb Firmware: up to and including 21.002
  • Rockwellautomation 1766 L32bwaa Firmware: up to and including 21.002
  • Rockwellautomation 1766 L32awaa Firmware: up to and including 21.002
  • Rockwellautomation 1766 L32bwa Firmware: up to and including 21.002

References