cve/2017/CVE-2017-7781.md

### [CVE-2017-7781](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7781)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2055%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Elliptic%20curve%20point%20addition%20error%20when%20using%20mixed%20Jacobian-affine%20coordinates&color=brighgreen)

### Description

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. This vulnerability affects Firefox < 55.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1352039

#### Github
- https://github.com/ARPSyndicate/cvemon