Improper Carry Propagation in ecc-256_modp Function in Nettle

CVE-2015-8803 · HIGH Severity

AV:N/AC:L/AU:N/C:P/I:P/A:P

The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8805.

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