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Fencer Vulns
medium 5.9

CVE-2017-8932 json

Incorrect computation for P-256 curves in crypto/elliptic

published 2017-07-06 9 y ago modified 2026-06-17 4 mo ago also GO-2022-0187 , EUVD-2017-17872

cvss
5.9
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

A bug in the standard library ScalarMult implementation of curve P-256 for amd64 architectures in Go before 1.7.6 and 1.8.x before 1.8.2 causes incorrect results to be generated for specific input points. An adaptive attack can be mounted to progressively extract the scalar input to ScalarMult by submitting crafted points and observing failures to the derive correct output. This leads to a full key recovery attack against static ECDH, as used in popular JWT libraries.

Patch / fix

  • go stdlib 1.7.6, 1.8.2
  • golang RHEL 7 1.8.3-1.el7
  • golang-bin RHEL 7 1.8.3-1.el7
  • golang-src RHEL 7 1.8.3-1.el7
  • golang-misc RHEL 7 1.8.3-1.el7
  • golang-tests RHEL 7 1.8.3-1.el7

red hat advisories RHSA-2017:1859

  • runc SLE Module for Containers 12, OpenStack Cloud 6 0.1.1+gitr2947_9c2d8d1-20.3
  • docker SLE Module for Containers 12, OpenStack Cloud 6 17.04.0_ce-98.2
  • containerd SLE Module for Containers 12, OpenStack Cloud 6 0.2.5+gitr639_422e31c-20.2
  • docker-distribution SLE Module for Containers 12 2.6.1-15.2
  • golang-github-docker-libnetwork SLE Module for Containers 12, OpenStack Cloud 6 0.0.0+git20170119.7b2b1fe-4.1

suse advisories SUSE-RU-2017:1965-1

  • go openSUSE Tumbleweed 1.17-1.1
  • go1.10 openSUSE Tumbleweed 1.10.8-8.2
  • go1.11 openSUSE Tumbleweed 1.11.13-10.5
  • go1.12 openSUSE Tumbleweed 1.12.17-4.8
  • go1.9 openSUSE Tumbleweed 1.9.7-11.2
  • go Package Hub 12 1.7.0-12.1

opensuse advisories openSUSE-SU-2024:10802-1openSUSE-SU-2024:10803-1openSUSE-SU-2024:10804-1openSUSE-SU-2024:10805-1openSUSE-SU-2024:10812-1openSUSE-SU-2017:1649-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-8932 updated cvss 4.8

golang: Elliptic curves carry propagation issue in x86-64 P-256

  • Red Hat OpenStack Platform 8 (Liberty) Operational Tools golang, golang-src, golang-pkg-linux-amd64, golang-pkg-bin-linux-amd64 Red Hat OpenStack Platform 9 (Mitaka) Operational Tools golang, golang-bin, golang-src
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Enterprise 3 golang
    under investigation
  • Red Hat Enterprise Linux Server Optional (v. 7) golang 1.8.3-1.el7, golang-bin 1.8.3-1.el7, golang-src 1.8.3-1.el7, golang-misc 1.8.3-1.el7, golang-tests 1.8.3-1.el7
    fixed: vendor fix RHSA-2017:1859

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.23% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected packages

ecosystem package affected fixed in
go stdlib
>=1.6.0-0, <1.7.6
>=1.8.0-0, <1.8.2
1.7.6
1.8.2

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.