Oberon PSA Crypto up to 1.5.1 RSA-OEAP rsa algorithm without oaep

CVSS Meta Temp Score
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CTI Interest Score
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3.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Oberon PSA Crypto up to 1.5.1 and classified as problematic. The impacted element is an unknown function of the component RSA-OEAP Handler. Such manipulation leads to use of rsa algorithm without oaep. This vulnerability is listed as CVE-2025-9071. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Oberon PSA Crypto up to 1.5.1. Affected by this issue is an unknown code of the component RSA-OEAP Handler. The manipulation with an unknown input leads to a use of rsa algorithm without oaep vulnerability. Using CWE to declare the problem leads to CWE-780. The product uses the RSA algorithm but does not incorporate Optimal Asymmetric Encryption Padding (OAEP), which might weaken the encryption. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at oberon.ch. This vulnerability is handled as CVE-2025-9071 since 08/15/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.1

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use of rsa algorithm without oaep
CWE: CWE-780 / CWE-326 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/15/2025 CVE reserved
08/29/2025 +14 days Advisory disclosed
08/29/2025 +0 days VulDB entry created
08/29/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: oberon.ch
Status: Confirmed

CVE: CVE-2025-9071 (🔒)
GCVE (CVE): GCVE-0-2025-9071
GCVE (VulDB): GCVE-100-321878

Entryinfo

Created: 08/29/2025 11:59
Changes: 08/29/2025 11:59 (66)
Complete: 🔍
Cache ID: 216::103

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