CyberSecBulletin
CVE-2024-31485NVD status: Deferred

CPCI85 Central Processing/Communication: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2024-31485 is a high-severity improper neutralization of special elements used in a command vulnerability in CPCI85 Central Processing/Communication from Siemens, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists version V5.30 as the first without the flaw, so updating CPCI85 Central Processing/Communication to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.44% chance of exploitation within 30 days, higher than 85% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update CPCI85 Central Processing/Communication to V5.30 or a later version.
  2. Update SICORE Base system to V1.3.0 or a later version.
  3. Update cpci85_firmware to V5.30 or a later version.

Affected products and versions

VendorProductAffected versionsFixed in
SiemensCPCI85 Central Processing/Communicationbefore V5.30V5.30
SiemensSICORE Base systembefore V1.3.0V1.3.0
Siemenscpci85_firmwarebefore V5.30V5.30

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.
Privileges required
HighAdministrator-level access is required first.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (siemens.com).

Scoring systemScoreSeverityScored by
CVSS 4.08.6HighCNA (siemens.com)
CVSS 3.17.2HighCNA (siemens.com)

Official description

A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V5.30), SICORE Base system (All versions < V1.3.0). The web interface of affected devices is vulnerable to command injection due to missing server side input sanitation. This could allow an authenticated privileged remote attacker to execute arbitrary code with root privileges.

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

The underlying weakness: Improper Neutralization of Special Elements used in a Command

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

How developers prevent this class of flaw

  • If at all possible, use library calls rather than external processes to recreate the desired functionality.
  • If possible, ensure that all external commands called from the program are statically created.
  • Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in CPCI85 Central Processing/Communication

All CPCI85 Central Processing/Communication vulnerabilities

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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