QID 591174

Date Published: 2022-11-24

QID 591174: Siemens SIMATIC PCS 7, Step 7, Starter Incorrect Permission Assignment Vulnerability (SSA-661034)

AFFECTED PRODUCTS
The following Siemens products are affected:
SIMATIC PCS 7 V8.2 and earlier All versions
SIMATIC STEP 7 V5.X All versions prior to V5.7
SINAMICS STARTER (containing STEP 7 OEM version) All versions prior to V5.4 SP2 HF1

QID Detection Logic (Authenticated):
QID checks for the Vulnerable version of Siemens using registry "HKLM\SOFTWARE\Siemens"

Successful exploitation of this vulnerability could allow an attacker to change the content of certain metafiles and subsequently manipulate the parameters or behavior of devices configured by the affected software products.

CVSS V3 rated as Critical - 8.8 severity.

CVSS V2 rated as High - 7.2 severity.

Solution

Customers are advised to refer to CERT MITIGATIONS section SSA-661034 for affected packages and patching details.Workaround:
The vendor has advised restricting access to the engineering station to trusted users only.

Vendor References

SSA-661034 - cert-portal.siemens.com/productcert/html/ssa-661034.html

CVEs related to QID 591174

CVE-2021-31894 |

Software Advisories

Advisory ID	Software	Component	Link
SSA-661034			cert-portal.siemens.com/productcert/html/ssa-661034.html

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