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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-7781 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 6.1 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Attack Vector | Network |
Attack Complexity | Low |
Privileges Required | None |
User Interaction | Required |
Scope | Changed |
Confidentiality | Low |
Integrity Impact | Low |
Availability Impact | None |
Platform | Package | State |
---|---|---|
Red Hat Enterprise Linux 7 | nss-softokn | Will not fix |
Red Hat Enterprise Linux 6 | nss-softokn | Will not fix |
Red Hat Enterprise Linux 5 | nss | Will not fix |