CVE-2025-9071 Insecure RSA-OAEP implementation with all-zero seed for padding in Oberon PSA Crypto
Insecure RSA-OAEP implementation using an all-zero seed allows attackers to decrypt guessable messages and identify repeated ciphertexts in Oberon PSA Crypto.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-9071?
CVE-2025-9071 is a low-severity vulnerability in Oberon PSA Crypto, published on 29 Aug 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-780
Which versions are affected by CVE-2025-9071?
How do I fix CVE-2025-9071?
No fix has been published for CVE-2025-9071 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-9071 being exploited?
There is no known exploitation of CVE-2025-9071 in the wild and no public exploit code.
Sources
Also known as GHSA-5h27-5x9j-ffpx.