CVE-2017-7781

Name: CVE-2017-7781
Creator: NVD / NIST
Published: 2018-06-11T21:29:08.89+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.76%

Last modified Jun 17, 2026

CVE-2017-7781 is a vulnerability of currently unknown severity. 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. EPSS estimates a 2.76% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.76%

84.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 55.0

References

http://www.securityfocus.com/bid/100383Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039124Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1352039Exploit, Issue Tracking, Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-18/Vendor Advisory
http://www.securityfocus.com/bid/100383Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039124Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1352039Exploit, Issue Tracking, Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2017-18/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7781?

How severe is CVE-2017-7781?

Severity scoring for CVE-2017-7781 is pending analysis. The EPSS model estimates a 2.76% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7781?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-7781?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST