An elliptic curve point addition error has been found in Firefox < 55.0. An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result POINT_AT_INFINITY 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 incorrect shared secret.
An elliptic curve point addition error has been found in Firefox < 55.0. An error occurs in the elliptic curve point addition algorithm that uses mixed Jacobian-affine coordinates where it can yield a result POINT_AT_INFINITY 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 incorrect shared secret.
https://www.mozilla.org/en-US/security/advisories/mfsa2017-18/#CVE-2017-7781 https://bugzilla.mozilla.org/show_bug.cgi?id=1352039
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