جزئیات آسیب‌پذیری

RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support, including types and traits for representing various elliptic curve forms, scalars, points, and public/secret keys composed thereof. In versions 0.14.0-pre.0 and 0.14.0-rc.0, a denial-of-service vulnerability exists in the SM2 PKE decryption path where an invalid elliptic-curve point (C1) is decoded and the resulting value is unwrapped without checking. Specifically, AffinePoint::from_encoded_point(&encoded_c1) may return a None/CtOption::None when the supplied coordinates are syntactically valid but do not lie on the SM2 curve. The calling code previously used .unwrap(), causing a panic when presented with such input. This issue has been patched via commit 085b7be.

• https://github.com/RustCrypto/elliptic-curves/pull/1602 x_refsource_MISC
• https://github.com/RustCrypto/elliptic-curves/commit/085b7bee647029bd189e1375203418205006bcab x_refsource_MISC
• https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-78p6-6878-8mj6 x_refsource_CONFIRM