Incorrect computation for P-256 curves in crypto/elliptic

中 5.9CVE-2017-8932 · GO-2022-0187 · 06/07/2017 公開 · 17/06/2026 更新

要点

CVE-2017-8932 は stdlib, go (golang), suse package hub for suse linux enterprise (novell) に影響する深刻度「中」 (CVSS 5.9) の脆弱性です。
今後30日間に悪用される確率（EPSS）：2.2%（全脆弱性の 82.7% より高い）。
対処：1.7.6, 1.8.2 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
stdlib Go	`≥ 1.6.0-0, < 1.7.6≥ 1.8.0-0, < 1.8.2`	`1.7.61.8.2`
go golang	`= 1.8= 1.8.1≤ 1.7.5`	修正版なし
suse package hub for suse linux enterprise novell	`= 12`	修正版なし

概要

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.

NVD の説明

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.