CVE-2017-8932
Medium
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.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Go
PublishedJul 6, 2017
First seenJul 6, 2017
How to fix
Update
- stdlib1.7.6, 1.8.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | v ≤ 1.7.5, 1.8, 1.8.1 | — |
| novell suse_package_hub_for_suse_linux_enterprise | 12 | — |
| fedoraproject fedora | 25 | — |
| opensuse leap | 42.2 | — |
| stdlibGo | 1.6.0-0 ≤ v < 1.7.6, 1.8.0-0 ≤ v < 1.8.2 | 1.7.6, 1.8.2 |
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