CyberSecBulletin
CVE-2024-12373NVD status: Deferred

PM1k 1408-BC3A-485: Buffer Copy without Checking Size of Input

Published Updated By the CyberSecBulletin desk

CVE-2024-12373 is a critical-severity buffer copy without checking size of input vulnerability in PM1k 1408-BC3A-485 from Rockwell Automation, with a CVSS 4.0 base score of 9.3 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected PM1k 1408-BC3A-485 versions: <4.020. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.51% chance of exploitation within 30 days, which is low compared with other CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Check which version of PM1k 1408-BC3A-485 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on rockwellautomation.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Rockwell AutomationPM1k 1408-BC3A-485<4.020Not stated
Rockwell AutomationPM1k 1408-BC3A-ENT<4.020Not stated
Rockwell AutomationPM1k 1408-TS3A-485<4.020Not stated
Rockwell AutomationPM1k 1408-TS3A-ENT<4.020Not stated
Rockwell AutomationPM1k 1408-EM3A-485<4.020Not stated
Rockwell AutomationPM1k 1408-EM3A-ENT<4.020Not stated
Rockwell AutomationPM1k 1408-TR1A-485<4.020Not stated
Rockwell AutomationPM1k 1408-TR2A-485<v4.020Not stated
Rockwell AutomationPM1k 1408-EM1A-485<4.020Not stated
Rockwell AutomationPM1k 1408-EM2A-485<4.020Not stated
Rockwell AutomationPM1k 1408-TR1A-ENT<4.020Not stated
Rockwell AutomationPM1k 1408-TR2A-ENT<4.020Not stated
Rockwell AutomationPM1k 1408-EM1A-ENT<4.020Not stated
Rockwell AutomationPM1k 1408-EM2A-ENT<4.020Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Attack requirements
NoneThe attack does not depend on a particular deployment or configuration.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Confidentiality (vulnerable system)
HighSerious loss of confidentiality on the vulnerable system.
Integrity (vulnerable system)
HighSerious loss of integrity on the vulnerable system.
Availability (vulnerable system)
HighSerious loss of availability on the vulnerable system.
Confidentiality (other systems)
NoneNo loss of confidentiality on systems beyond the vulnerable one.
Integrity (other systems)
NoneNo loss of integrity on systems beyond the vulnerable one.
Availability (other systems)
NoneNo loss of availability on systems beyond the vulnerable one.

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Scored by CNA (rockwellautomation.com).

Official description

A denial-of-service vulnerability exists in the Rockwell Automation Power Monitor 1000. The vulnerability results in a buffer-overflow, potentially causing denial-of-service.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: 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.

How developers prevent this class of flaw

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer. Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. Examples include the Safe C String Library (SafeStr) by Messier and Viega, and the Strsafe.h library from Microsoft. These libraries provide safer versions of overflow-prone string-handling functions.
  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking. D3-SFCV (Stack Frame Canary Validation) from D3FEND discusses canary-based detection in detail.

More Buffer Copy without Checking Size of Input vulnerabilities (CWE-120)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in PM1k 1408-BC3A-485

All PM1k 1408-BC3A-485 vulnerabilities

Recent Buffer Copy without Checking Size of Input vulnerabilities

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