CVE-2017-7781 Affecting firefox package, versions <55.0.2+build1-0ubuntu4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published11 Jun 2018
- disclosed11 Jun 2018
Introduced: 11 Jun 2018
CVE-2017-7781 (opens in a new tab)How to fix?
Upgrade Ubuntu:21.04 firefox to version 55.0.2+build1-0ubuntu4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu.
See How to fix? for Ubuntu:21.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-7781
- https://security-tracker.debian.org/tracker/CVE-2017-7781
- https://www.mozilla.org/security/advisories/mfsa2017-18/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1352039
- http://www.securityfocus.com/bid/100383
- http://www.securitytracker.com/id/1039124