CVE-2018-14821: rockwell automation rslinx classic® Heap-based Buffer Overflow

Vulnerability summary

CVE-2018-14821 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in rockwell automation rslinx classic®. EPSS estimates a 4.50% chance of exploitation in the next 30 days, higher than 91.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 20-09-2018
   PublishedVulnerability first disclosed.
2. 17-09-2024
   Last modifiedVulnerability information updated.

Description

Rockwell Automation RSLinx Classic Versions 4.00.01 and prior. This vulnerability may allow a remote, unauthenticated threat actor to intentionally send a malformed CIP packet to Port 44818, causing the RSLinx Classic application to terminate. The user will need to manually restart the software to regain functionality.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.