CVE-2021-42023

MEDIUM

Siemens Modelsim - Insufficiently Protected Credentials

Title source: rule

Description

A vulnerability has been identified in ModelSim Simulation (All versions), Questa Simulation (All versions). The RSA white-box implementation in affected applications insufficiently protects the built-in private keys that are required to decrypt electronic intellectual property (IP) data in accordance with the IEEE 1735 recommended practice. This could allow a sophisticated attacker to discover the keys, bypassing the protection intended by the IEEE 1735 recommended practice.

References (1)

[Patch, Vendor Advisory] https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdf

Scores

CVSS v3 6.5

EPSS 0.0014

EPSS Percentile 34.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Classification

CWE

CWE-522

Status published

Affected Products (2)

siemens/modelsim

siemens/questa

Timeline

Published Dec 14, 2021

Tracked Since Feb 18, 2026