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ID

VAR-202112-0735


CVE

CVE-2021-42023


TITLE

ModelSim Simulation  and  Questa Simulation  Vulnerability regarding insufficient protection of authentication information in

Trust: 0.8

sources: JVNDB: JVNDB-2021-016332

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

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sources: NVD: CVE-2021-42023 // JVNDB: JVNDB-2021-016332

AFFECTED PRODUCTS

vendor:siemensmodel:questascope:eqversion:*

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vendor:siemensmodel:modelsimscope:eqversion:*

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vendor:シーメンスmodel:modelsim simulationscope: - version: -

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vendor:シーメンスmodel:questa simulationscope: - version: -

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sources: JVNDB: JVNDB-2021-016332 // NVD: CVE-2021-42023

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-42023
value: MEDIUM

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NVD: CVE-2021-42023
value: MEDIUM

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CNNVD: CNNVD-202112-1188
value: MEDIUM

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nvd@nist.gov: CVE-2021-42023
severity: LOW
baseScore: 2.1
vectorString: AV:L/AC:L/AU:N/C:P/I:N/A:N
accessVector: LOCAL
accessComplexity: LOW
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: NONE
availabilityImpact: NONE
exploitabilityScore: 3.9
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

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nvd@nist.gov: CVE-2021-42023
baseSeverity: MEDIUM
baseScore: 6.5
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: NONE
availabilityImpact: NONE
exploitabilityScore: 2.8
impactScore: 3.6
version: 3.1

Trust: 1.0

NVD: CVE-2021-42023
baseSeverity: MEDIUM
baseScore: 6.5
vectorString: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: LOW
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: NONE
availabilityImpact: NONE
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

sources: CNNVD: CNNVD-202112-1188 // JVNDB: JVNDB-2021-016332 // NVD: CVE-2021-42023

PROBLEMTYPE DATA

problemtype:CWE-522

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problemtype:Inadequate protection of credentials (CWE-522) [ others ]

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sources: JVNDB: JVNDB-2021-016332 // NVD: CVE-2021-42023

THREAT TYPE

remote

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sources: CNNVD: CNNVD-202112-1188

TYPE

other

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sources: CNNVD: CNNVD-202112-1188

PATCH

title:SSA-400332url:https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdf

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title:ModelSim Simulation Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=175397

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sources: CNNVD: CNNVD-202112-1188 // JVNDB: JVNDB-2021-016332

EXTERNAL IDS

db:NVDid:CVE-2021-42023

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db:SIEMENSid:SSA-400332

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db:ICS CERTid:ICSA-21-350-13

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db:JVNid:JVNVU96592426

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db:JVNDBid:JVNDB-2021-016332

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db:CS-HELPid:SB2022010511

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db:CNNVDid:CNNVD-202112-1188

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sources: CNNVD: CNNVD-202112-1188 // JVNDB: JVNDB-2021-016332 // NVD: CVE-2021-42023

REFERENCES

url:https://cert-portal.siemens.com/productcert/pdf/ssa-400332.pdf

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url:https://nvd.nist.gov/vuln/detail/cve-2021-42023

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url:https://jvn.jp/vu/jvnvu96592426/index.html

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url:https://www.cisa.gov/uscert/ics/advisories/icsa-21-350-13

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url:https://us-cert.cisa.gov/ics/advisories/icsa-21-350-13

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url:https://www.cybersecurity-help.cz/vdb/sb2022010511

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sources: CNNVD: CNNVD-202112-1188 // JVNDB: JVNDB-2021-016332 // NVD: CVE-2021-42023

CREDITS

Julian Speith and Christof Paar from Max Planck Institute for Security and Privacy coordinated this vulnerability with Siemens.

Trust: 0.6

sources: CNNVD: CNNVD-202112-1188

SOURCES

db:CNNVDid:CNNVD-202112-1188
db:JVNDBid:JVNDB-2021-016332
db:NVDid:CVE-2021-42023

LAST UPDATE DATE

2026-06-19T20:11:13.336000+00:00


SOURCES UPDATE DATE

db:CNNVDid:CNNVD-202112-1188date:2022-01-06T00:00:00
db:JVNDBid:JVNDB-2021-016332date:2022-12-12T06:55:00
db:NVDid:CVE-2021-42023date:2026-06-17T04:09:11.597

SOURCES RELEASE DATE

db:CNNVDid:CNNVD-202112-1188date:2021-12-14T00:00:00
db:JVNDBid:JVNDB-2021-016332date:2022-12-12T00:00:00
db:NVDid:CVE-2021-42023date:2021-12-14T12:15:09.917