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.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZH4T47ROLZ6YEZBDVXVS2KISTDMXAPS/

https://groups.google.com/d/msg/golang-announce/B5ww0iFt1_Q/TgUFJV14BgAJ

https://go-review.googlesource.com/c/41070/

https://github.com/golang/go/issues/20040

https://github.com/golang/go/commit/9294fa2749ffee7edbbb817a0ef9fe633136fa9c

https://bugzilla.redhat.com/show_bug.cgi?id=1455191

https://access.redhat.com/errata/RHSA-2017:1859

http://lists.opensuse.org/opensuse-updates/2017-06/msg00080.html

http://lists.opensuse.org/opensuse-updates/2017-06/msg00079.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3