CVE-2017-8932

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.

Score

CVSS 3.0 5.9 Medium

Status

Modified - cve@mitre.org

Published

2017-07-06

Last modified

2024-08-05

Weaknesses

CWE-682

Affected products

• Fedora (Fedoraproject)
• Go (Golang)
• Suse Package Hub For Suse Linux Enterprise (Novell)
• Leap (Opensuse)

References

• http://lists.opensuse.org/opensuse-updates/2017-06/msg00079.html
• http://lists.opensuse.org/opensuse-updates/2017-06/msg00080.html
• https://access.redhat.com/errata/RHSA-2017:1859
• https://bugzilla.redhat.com/show_bug.cgi?id=1455191
• https://github.com/golang/go/commit/9294fa2749ffee7edbbb817a0ef9fe633136fa9c
• https://github.com/golang/go/issues/20040
• https://go-review.googlesource.com/c/41070/
• https://groups.google.com/d/msg/golang-announce/B5ww0iFt1_Q/TgUFJV14BgAJ
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZH4T47ROLZ6YEZBDVXVS2…