CVE-2021-42023
Siemens · published 2021-12-14
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Siemens AG via the CVE Program.
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.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Siemens | ModelSim Simulation | All versions: affected |
| Siemens | Questa Simulation | All versions: affected |
Products named in NVD's CPE match criteria (2)
cpe:2.3:a:siemens:modelsim:*:*:*:*:*:*:*:*cpe:2.3:a:siemens:questa:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 6.5 MEDIUM — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0: 2.1 LOW — as published by NIST (Primary)
AV:L/AC:L/Au:N/C:P/I:N/A:N
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdf
Source dates: published 2021-12-14, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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