| Package | Affected versions | Patched versions |
|---|---|---|
| stanford javascript crypto library | ≤ 1.0.8 | |
| sjcl | < 1.0.9 | 1.0.9 |
All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback.
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