CyberSecBulletin
CVE-2023-28832NVD status: Modified

SIMATIC Cloud Connect 7 CC712: Improper Neutralization of Special Elements used in a Command

Published Updated By the CyberSecBulletin desk

CVE-2023-28832 is a high-severity improper neutralization of special elements used in a command vulnerability in SIMATIC Cloud Connect 7 CC712 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. Affected SIMATIC Cloud Connect 7 CC712 versions: All versions >= V2.0 < V2.1. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.54% chance of exploitation within 30 days, higher than 75% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of SIMATIC Cloud Connect 7 CC712 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on cert-portal.siemens.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
SiemensSIMATIC Cloud Connect 7 CC712All versions >= V2.0 < V2.1Not stated
SiemensSIMATIC Cloud Connect 7 CC716All versions >= V2.0 < V2.1Not stated
Siemens6gk1411-1ac00 Firmware2.0Not stated
Siemens6gk1411-5ac00 Firmware2.0Not 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.
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).

Official description

A vulnerability has been identified in SIMATIC Cloud Connect 7 CC712 (All versions >= V2.0 < V2.1), SIMATIC Cloud Connect 7 CC716 (All versions >= V2.0 < V2.1). The web based management of affected devices does not properly validate user input, making it susceptible to command injection. 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: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in SIMATIC Cloud Connect 7 CC712

All SIMATIC Cloud Connect 7 CC712 vulnerabilities

Recent Improper Neutralization of Special Elements used in a Command vulnerabilities

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