Stack-based buffer overrun (or stack-based buffer overflow) is a bug that indicates that a program writes more data to a buffer located on the stack than is actually allocated for the buffer.

The software maker announced that a stack-based buffer overflow flaw in its VPN appliance has been exploited in the wild. Ivanti Policy Secure and Ivanti Neurons for ZTA gateways are also impacted.

What is a buffer overflow, how is this software vulnerability exploited by hackers and how can you defend against buffer overflow attacks?

Patches are available for buffer overflow bugs in Yokogawa production control software. Public exploits are available for the vulnerabilities, as well as a Metasploit module.

SonicWall bug in 800K VPN firewalls was only partially fixed In October last year, BleepingComputer reported on a critical stack-based Buffer Overflow vulnerability in SonicWall VPN firewalls.