SecuriTricks - CVE-2025-9071

Description

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.

Product(s) Impacted

Vendor	Product	Versions
Oberon Microsystems	Oberon Psa Crypto	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-780

Use of RSA Algorithm without OAEP

The product uses the RSA algorithm but does not incorporate Optimal Asymmetric Encryption Padding (OAEP), which might weaken the encryption.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	oberon_microsystems	oberon_psa_crypto	/	/	/	/	/	/	/	/

References

https://www.oberon.ch/security-advisories/cve-2025-9071/

CVSS Score

2.3 / 10

CVSS Data - 4.0

Attack Vector: NETWORK
Attack Complexity: HIGH
Attack Requirements: NONE
Privileges Required: NONE
User Interaction: PASSIVE
Scope:
Confidentiality Impact: LOW
Integrity Impact: NONE
Availability Impact: NONE
Exploit Maturity: NOT_DEFINED

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

View Vector String

Timeline

Published: Aug. 29, 2025, 10:15 a.m.
Last Modified: Aug. 29, 2025, 4:24 p.m.

Status : Awaiting Analysis

CVE has been marked for Analysis. Normally once in this state the CVE will be analyzed by NVD staff within 24 hours.

More info

Source

vulnerability@ncsc.ch

CVE-2025-9071