CVE-2020-15522

Description

Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.

How to fix CVE-2020-15522

To remediate CVE-2020-15522, upgrade the affected package to a fixed version below.

—upgrade to 1.68-1 or later
—upgrade to 1.0.2.1 or later
—upgrade to 1.66 or later
—upgrade to 1.66 or later
—upgrade to 1.66 or later
—upgrade to 1.66 or later
—upgrade to 1.66 or later
—upgrade to 1.66 or later
—upgrade to 1.66 or later
—upgrade to 1.8.7 or later

Is CVE-2020-15522 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (10)

from 0, < 1.68-1
from 0, < 1.0.2.1
from 0, < 1.66
from 0, < 1.66
from 0, < 1.66
from 0, < 1.66
from 0, < 1.66
from 0, < 1.66
from 0, < 1.66
from 0, < 1.8.7

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM5.1	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N