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Vulnerability Details :

CVE-2025-9071

Summary
Assigner-NCSC.ch
Assigner Org ID-455daabc-a392-441d-aa46-37d35189897c
Published At-29 Aug, 2025 | 09:19
Updated At-29 Aug, 2025 | 13:45
Rejected At-
Credits

Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto

Erroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG’s Oberon PSA Crypto library in all versions up to 1.5.1, results in deterministic RSA and thus in a loss of confidentiality for guessable messages, recognition of repeated messages, and loss of security proofs.

Vendors
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Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:NCSC.ch
Assigner Org ID:455daabc-a392-441d-aa46-37d35189897c
Published At:29 Aug, 2025 | 09:19
Updated At:29 Aug, 2025 | 13:45
Rejected At:
▼CVE Numbering Authority (CNA)
Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto

Erroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG’s Oberon PSA Crypto library in all versions up to 1.5.1, results in deterministic RSA and thus in a loss of confidentiality for guessable messages, recognition of repeated messages, and loss of security proofs.

Affected Products
Vendor
Oberon microsystems AG
Product
Oberon PSA Crypto
Default Status
unaffected
Versions
Affected
  • From 1.0.0 through 1.5.1 (custom)
    • -> unaffectedfromrsa_oaep_padding.patch
Problem Types
TypeCWE IDDescription
CWECWE-780CWE-780 Use of RSA Algorithm without OEAP
Type: CWE
CWE ID: CWE-780
Description: CWE-780 Use of RSA Algorithm without OEAP
Metrics
VersionBase scoreBase severityVector
4.02.3LOW
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/S:N/RE:L
Version: 4.0
Base score: 2.3
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/S:N/RE:L
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-97CAPEC-97 Cryptanalysis
CAPEC ID: CAPEC-97
Description: CAPEC-97 Cryptanalysis
Solutions

Configurations

Workarounds

Exploits

Credits

finder
Nordic Semiconductor ASA
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.oberon.ch/security-advisories/cve-2025-9071/
N/A
Hyperlink: https://www.oberon.ch/security-advisories/cve-2025-9071/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:vulnerability@ncsc.ch
Published At:29 Aug, 2025 | 10:15
Updated At:29 Aug, 2025 | 16:24

Erroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG’s Oberon PSA Crypto library in all versions up to 1.5.1, results in deterministic RSA and thus in a loss of confidentiality for guessable messages, recognition of repeated messages, and loss of security proofs.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.02.3LOW
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:X/R:X/V:X/RE:L/U:X
Type: Secondary
Version: 4.0
Base score: 2.3
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:X/R:X/V:X/RE:L/U:X
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-780Secondaryvulnerability@ncsc.ch
CWE ID: CWE-780
Type: Secondary
Source: vulnerability@ncsc.ch
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://www.oberon.ch/security-advisories/cve-2025-9071/vulnerability@ncsc.ch
N/A
Hyperlink: https://www.oberon.ch/security-advisories/cve-2025-9071/
Source: vulnerability@ncsc.ch
Resource: N/A

Change History

0
Information is not available yet

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