| commit | d5f2dc6a5ca30590b121622af8f918d4484d4946 | [log] [tgz] |
|---|---|---|
| author | Filippo Valsorda <filippo@golang.org> | Tue Jan 22 16:02:41 2019 -0500 |
| committer | Julie Qiu <julieqiu@google.com> | Wed Jan 23 17:28:54 2019 +0000 |
| tree | 750a11205d2eafc04aa2207d4b7fb3713c545fea | |
| parent | f5ff72d62301c4e9d0a78167fab5914ca12919bd [diff] |
[release-branch.go1.10-security] crypto/elliptic: reduce subtraction term to prevent long busy loop If beta8 is unusually large, the addition loop might take a very long time to bring x3-beta8 back positive. This would lead to a DoS vulnerability in the implementation of the P-521 and P-384 elliptic curves that may let an attacker craft inputs to ScalarMult that consume excessive amounts of CPU. This fixes CVE-2019-6486. Change-Id: Ia969e8b5bf5ac4071a00722de9d5e4d856d8071a Reviewed-on: https://team-review.git.corp.google.com/c/399777 Reviewed-by: Adam Langley <agl@google.com> Reviewed-by: Julie Qiu <julieqiu@google.com> (cherry picked from commit 746d6abe2dfb9ce7609f8e1e1a8dcb7e221f423e) Reviewed-on: https://team-review.git.corp.google.com/c/401143 Reviewed-by: Filippo Valsorda <valsorda@google.com>
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