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.

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-1608 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.
Github GHSA Github GHSA GHSA-6xx3-rg99-gc3p Timing based private key exposure in Bouncy Castle
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 17 Jul 2025 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Bouncycastle fips Java Api
CPEs cpe:2.3:a:bouncycastle:legion-of-the-bouncy-castle-fips-java-api:*:*:*:*:*:*:*:* cpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*
Vendors & Products Bouncycastle legion-of-the-bouncy-castle-fips-java-api
Bouncycastle fips Java Api

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T13:15:20.863Z

Reserved: 2020-07-04T00:00:00

Link: CVE-2020-15522

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-05-20T12:15:08.003

Modified: 2025-07-17T17:04:58.987

Link: CVE-2020-15522

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-05-20T00:00:00Z

Links: CVE-2020-15522 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses