CVE-2017-7781 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

http://www.securityfocus.com/bid/100383 http://www.securitytracker.com/id/1039124 https://bugzilla.mozilla.org/show_bug.cgi?id=1352039 https://www.mozilla.org/security/advisories/mfsa2017-18/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.9