[gnutls-devel] GnuTLS | Behavioral PKCS#1 v1.5 decryption oracle (Ok/Err bit) (#1901)

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Tue Jun 9 12:01:18 CEST 2026




Alicja Kario (@mention me if you need reply) commented: https://gitlab.com/gnutls/gnutls/-/work_items/1901#note_3436648783


Sorry @eslerm, I remembered that we fixed it, I misremembered how we fixed it in GnuTLS.

Yes, the API in GnuTLS can be used securely, it's just hard to do. Implicit rejection would be nice for calling applications but given that RSA PKCS#1v1.5 encryption is on the way out, it may be better to remove it than to add implicit rejection.

So, I agree on triaging it as a enhancement.

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