OSEC-2026-13 ECDSA accepts the point at infinity as a P256, P384, P521 public key

P256,P384,P521.Dsa.pubofoctets accepts 0x00, the encoding of the point at infinity, as a public key. The Diffie-Hellman path rejects that point pointofoctets; the ECDSA path skips the same check. Under such a key a signature can be forged with no private key, as the repro shows. The same class is...

PT-2025-2394 · Illumos · Illumos

Name of the Vulnerable Software and Affected Versions: illumos illumos-gate affected versions not specified Description: An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates, causing the algorithm to yield a result of POINT AT INFINITY when it...

SUSE CVE-2017-7781

An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result "POINTATINFINITY" when it should not. A man-in-the-middle attacker could use this to interfere with a connection, resulting in an attacked party computing an...

CVE-2020-12607

An issue was discovered in fastecdsa before 2.1.2. When using the NIST P-256 curve in the ECDSA implementation, the point at infinity is mishandled. This means that for an extreme value in k and s^-1, the signature verification fails even if the signature is correct. This behavior is not solely a...

CVE-2020-12607

An issue was discovered in fastecdsa before 2.1.2. When using the NIST P-256 curve in the ECDSA implementation, the point at infinity is mishandled. This means that for an extreme value in k and s^-1, the signature verification fails even if the signature is correct. This behavior is not solely a...

PT-2020-13166 · Fastecdsa · Fastecdsa

Name of the Vulnerable Software and Affected Versions: fastecdsa versions prior to 2.1.2 Description: An issue was discovered in the ECDSA implementation when using the NIST P-256 curve. The point at infinity is mishandled, which means that for extreme values in k and s^-1, the signature...