Mozilla: Elliptic curve point addition error when using mixed Jacobian-affine coordinates (MFSA 2017-18)
Published Jun 11, 2018
6.1
MEDIUMCVSS 3.0
EPSS 2.72%
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.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<55
- Version
No data.
Red Hat Enterprise Linux 5
nss
Will not fix
Red Hat Enterprise Linux 6
nss-softokn
Will not fix
Red Hat Enterprise Linux 7
nss-softokn
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | nss | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | nss-softokn | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | nss-softokn | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AV:N/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 2.72% (0.02720) | 85.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.76% (0.02755) | 84.27th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.16% (0.00158) | 52.68th | v3 (v2023.03.01) |
| Nov 2, 2023 | 0.16% (0.00158) | 52.16th | v3 (v2023.03.01) |
| Jun 5, 2023 | 0.22% (0.00224) | 59.37th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.29% (0.00293) | 64.30th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v1 |
| Jan 6, 2022 | 1.04% (0.01040) | 27.69th | v1 |
| Sep 1, 2021 | 1.04% (0.01040) | 64.49th | v1 |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/100383 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039124 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-7781 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1352039 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1479197 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2017-7781
- https://www.cve.org/CVERecord?id=CVE-2017-7781
- https://www.mozilla.org/en-US/security/advisories/mfsa2017-18/#CVE-2017-7781
- https://www.mozilla.org/security/advisories/mfsa2017-18/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/100383 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039124 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2017-7781 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1352039 | x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1479197 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2017-7781 | ||
| https://www.cve.org/CVERecord?id=CVE-2017-7781 | ||
| https://www.mozilla.org/en-US/security/advisories/mfsa2017-18/#CVE-2017-7781 | ||
| https://www.mozilla.org/security/advisories/mfsa2017-18/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.