CVE-2017-7781

Public Exploit

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.

5.9

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.57%

Vendor Advisory mozilla.org

Affected: Mozilla Firefox

References

Link	Tags
http://www.securityfocus.com/bid/100383	vdb entry third party advisory
https://www.mozilla.org/security/advisories/mfsa2017-18/	vendor advisory
http://www.securitytracker.com/id/1039124	vdb entry third party advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1352039	issue tracking exploit third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-7781?: CVE-2017-7781 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7781?: To fix CVE-2017-7781, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7781 being actively exploited in the wild?: It is possible that CVE-2017-7781 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7781?: CVE-2017-7781 affects Mozilla Firefox.

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