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.
02 / AFFECTED SOFTWARE
Affected packages
129 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
The ScalarMult implementation of curve P-256 for amd64 architectures generates incorrect results for certain specific input points. An adaptive attack can progressively extract the scalar input to ScalarMult by submitting crafted points and observing failures to derive correct output. This leads to a full key recovery attack against static ECDH, as used in popular JWT libraries.
05 / REFERENCES
Further evidence
- 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/LZH4T47ROLZ6YEZBDVXVS2KISTDMXAPS/
- https://go.dev/cl/41070
- https://go.dev/issue/20040
- https://go.googlesource.com/go/+/9294fa2749ffee7edbbb817a0ef9fe633136fa9c
- https://groups.google.com/g/golang-announce/c/B5ww0iFt1_Q/m/TgUFJV14BgAJ