CVE-2025-9071 (GCVE-0-2025-9071)
Vulnerability from cvelistv5 – Published: 2025-08-29 09:19 – Updated: 2025-08-29 13:45
VLAI
EPSS
VEX
Title
Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-29 13:45 UTC
CWE
- CWE-780 - Use of RSA Algorithm without OEAP
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Oberon microsystems AG | Oberon PSA Crypto |
Affected:
1.0.0 , ≤ 1.5.1
(custom)
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-9071",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-29T13:45:26.977528Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-08-29T13:45:42.363Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Oberon PSA Crypto",
"vendor": "Oberon microsystems AG",
"versions": [
{
"changes": [
{
"at": "rsa_oaep_padding.patch",
"status": "unaffected"
}
],
"lessThanOrEqual": "1.5.1",
"status": "affected",
"version": "1.0.0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Nordic Semiconductor ASA"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan style=\"background-color: rgb(248, 248, 248);\"\u003e\u003cspan style=\"background-color: rgb(248, 248, 248);\"\u003eErroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG\u2019s 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.\u003c/span\u003e\u003c/span\u003e\u003cbr\u003e"
}
],
"value": "Erroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG\u2019s 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."
}
],
"impacts": [
{
"capecId": "CAPEC-97",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-97 Cryptanalysis"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NEGLIGIBLE",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 2.3,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "LOW"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-780",
"description": "CWE-780 Use of RSA Algorithm without OEAP",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-08-29T09:19:59.959Z",
"orgId": "455daabc-a392-441d-aa46-37d35189897c",
"shortName": "NCSC.ch"
},
"references": [
{
"url": "https://www.oberon.ch/security-advisories/cve-2025-9071/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
"assignerShortName": "NCSC.ch",
"cveId": "CVE-2025-9071",
"datePublished": "2025-08-29T09:19:59.959Z",
"dateReserved": "2025-08-15T14:58:36.635Z",
"dateUpdated": "2025-08-29T13:45:42.363Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2025-9071",
"date": "2026-10-03",
"epss": "0.00175",
"percentile": "0.0636"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-9071",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-29T13:45:26.977528Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-08-29T13:45:33.657Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Oberon PSA Crypto",
"vendor": "Oberon microsystems AG",
"versions": [
{
"changes": [
{
"at": "rsa_oaep_padding.patch",
"status": "unaffected"
}
],
"lessThanOrEqual": "1.5.1",
"status": "affected",
"version": "1.0.0",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Nordic Semiconductor ASA"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cspan style=\"background-color: rgb(248, 248, 248);\"\u003e\u003cspan style=\"background-color: rgb(248, 248, 248);\"\u003eErroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG\u2019s 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.\u003c/span\u003e\u003c/span\u003e\u003cbr\u003e"
}
],
"value": "Erroneously using an all-zero seed for RSA-OEAP padding instead of the generated random bytes, in Oberon microsystems AG\u2019s 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."
}
],
"impacts": [
{
"capecId": "CAPEC-97",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-97 Cryptanalysis"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NEGLIGIBLE",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 2.3,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "LOW"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-780",
"description": "CWE-780 Use of RSA Algorithm without OEAP",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-08-29T09:19:59.959Z",
"orgId": "455daabc-a392-441d-aa46-37d35189897c",
"shortName": "NCSC.ch"
},
"references": [
{
"url": "https://www.oberon.ch/security-advisories/cve-2025-9071/"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c",
"assignerShortName": "NCSC.ch",
"cveId": "CVE-2025-9071",
"datePublished": "2025-08-29T09:19:59.959Z",
"dateReserved": "2025-08-15T14:58:36.635Z",
"dateUpdated": "2025-08-29T13:45:42.363Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…