CVE-2017-8932

Description

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 2.46% Top 20%
Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory googlesource.com Vendor Advisory google.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://groups.google.com/d/msg/golang-announce/B5ww0iFt1_Q/TgUFJV14BgAJ mailing list vendor advisory
https://github.com/golang/go/commit/9294fa2749ffee7edbbb817a0ef9fe633136fa9c issue tracking third party advisory patch
https://access.redhat.com/errata/RHSA-2017:1859 vendor advisory
http://lists.opensuse.org/opensuse-updates/2017-06/msg00080.html third party advisory patch vendor advisory
http://lists.opensuse.org/opensuse-updates/2017-06/msg00079.html third party advisory patch vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1455191 issue tracking third party advisory
https://github.com/golang/go/issues/20040 third party advisory
https://go-review.googlesource.com/c/41070/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZH4T47ROLZ6YEZBDVXVS2KISTDMXAPS/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-8932?
CVE-2017-8932 has been scored as a medium severity vulnerability.
How to fix CVE-2017-8932?
To fix CVE-2017-8932, 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-2017-8932 being actively exploited in the wild?
It is possible that CVE-2017-8932 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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