CVE-2017-8932
MEDIUM severity · CVSS 5.9 · CWE-682
5.9CVSS MEDIUM
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)2%
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: http://lists.opensuse.org/opensuse-updates/2017-06/msg00079.html ↗
Additional information
- NVD record
- http://lists.opensuse.org/opensuse-updates/2017-06/msg00079.htmlPatch
- http://lists.opensuse.org/opensuse-updates/2017-06/msg00080.htmlPatch
- https://github.com/golang/go/commit/9294fa2749ffee7edbbb817a0ef9fe633136fa9cPatch
- https://go-review.googlesource.com/c/41070/Advisory
- https://groups.google.com/d/msg/golang-announce/B5ww0iFt1_Q/TgUFJV14BgAJAdvisory
- https://access.redhat.com/errata/RHSA-2017:1859
- https://bugzilla.redhat.com/show_bug.cgi?id=1455191Advisory
- https://github.com/golang/go/issues/20040Advisory