CVE-2025-9071

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

State: Published
Severity: 2.3 Low
Published: Aug 29, 2025
Updated: Aug 29, 2025
Reserved: Aug 15, 2025

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.

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	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	NCSC.ch

Weaknesses

CWE-780 Use of RSA Algorithm without OEAP

Affected Products

Product	Versions
Oberon PSA CryptoOberon microsystems AG	1.0.0 through 1.5.1Affectedfrom rsa_oaep_padding.patchNot affected

References

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

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