CyberSecBulletin
CVE-2024-8313NVD status: Deferred

APROL: Exposure of Sensitive System Information to an Unauthorized Control Sphere

Published Updated By the CyberSecBulletin desk

CVE-2024-8313 is a high-severity exposure of sensitive system information to an unauthorized control sphere vulnerability in APROL from B&R Industrial Automation, with a CVSS 4.0 base score of 8.7 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists version 4.4-00P5 as the first without the flaw, so updating APROL to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.22% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update APROL to 4.4-00P5 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
B&R Industrial AutomationAPROL4.4 up to, but not including, 4.4-00P54.4-00P5

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
AdjacentThe attacker must be on the same local network segment.
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:A/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 (ch.abb.com).

Official description

An Exposure of Sensitive System Information to an Unauthorized Control Sphere and Initialization of a Resource with an Insecure Default vulnerability in the SNMP component of B&R APROL <4.4-00P5 may allow an unauthenticated adjacent-based attacker to read and alter configuration using SNMP.

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

The underlying weakness: Exposure of Sensitive System Information to an Unauthorized Control Sphere

The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.

How developers prevent this class of flaw

  • Production applications should never use methods that generate internal details such as stack traces and error messages unless that information is directly committed to a log that is not viewable by the end user. All error message text should be HTML entity encoded before being written to the log file to protect against potential cross-site scripting attacks against the viewer of the logs

More Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerabilities (CWE-497)

Timeline

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

References

Other vulnerabilities in APROL

All APROL vulnerabilities

Recent Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerabilities

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