CVE-2021-31884CWE-170

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All…

published November 9, 2021

CVSS
—
EPSS
1%
Percentile
74.1
In the wild
Unconfirmed
What it is

⚠️ A sneaky assumption in the DHCP client could lead to out-of-bounds reads and writes—like a mailing service delivering to an incomplete address! 🚚 Think of it like a restaurant chef misreading a customer’s order because a critical detail was missing. They might end up making an entirely wrong dish or, worse, serve something that could spoil the dining experience! This vulnerability could result in unexpected behavior from the affected devices, potentially causing them to crash or become unresponsive—like a restaurant kitchen completely shutting down because of a mix-up in orders. If exploited, it might lead to Denial-of-Service conditions, impacting overall operational efficiency.

Put simply

Think of it like a restaurant chef misreading a customer’s order because a critical detail was missing. They might end up making an entirely wrong dish or, worse, serve something that could spoil the dining experience! The vulnerability arises from the DHCP client application not properly handling NULL-terminated hostname data. When the global hostname variable isn’t defined, it can trigger out-of-bound reads and writes, leading to stability issues.

What to do

This vulnerability could result in unexpected behavior from the affected devices, potentially causing them to crash or become unresponsive—like a restaurant kitchen completely shutting down because of a mix-up in orders. If exploited, it might lead to Denial-of-Service conditions, impacting overall operational efficiency. To mitigate this, ensure all versions of the affected APOGEE and Desigo devices are updated to their latest available versions, particularly those that rectify handling of DHCP options. Regularly audit your network for devices running affected versions to address any vulnerabilities preemptively. You've got this! By staying proactive and following these steps, you’re on your way to fortifying your network. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01499 · 74.1th percentile
Weakness
CWE-170 · Improper Null Termination
Published
2021-11-09T11:31Z
EPSS history
Timeline
  • 09 NOV 11:31Z
    A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All…
    cvelistv5