CVE-2020-15522

Severity CVSS v4.0:

Pending analysis

Type:

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Publication date:

20/05/2021

Last modified:

17/07/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

5.90

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:M/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0

4.30

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:bouncycastle:bc-csharp::::::::		1.8.7 (excluding)
cpe:2.3:a:bouncycastle:bouncy_castle_fips_.net_api::::::::		1.0.1.1 (excluding)
cpe:2.3:a:bouncycastle:fips_java_api::::::::		1.0.1.2 (excluding)
cpe:2.3:a:bouncycastle:fips_java_api::::::::	1.0.2 (including)	1.0.2.1 (excluding)
cpe:2.3:a:bouncycastle:the_bouncy_castle_crypto_package_for_java::::::::		1.66 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2020-15522

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools