medium
5.9
CWE
203 362 367
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2020-15522: Race Condition

First published: Thu May 20 2021(Updated: )

A flaw was found in bouncycastle. A timing issue within the EC math library can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
nuget/BouncyCastle<1.8.7
1.8.7
maven/org.bouncycastle:bcprov-jdk16<1.66
1.66
maven/org.bouncycastle:bcprov-jdk15to18<1.66
1.66
maven/org.bouncycastle:bcprov-jdk15on<1.66
1.66
maven/org.bouncycastle:bcprov-jdk14<1.66
1.66
maven/org.bouncycastle:bcprov-ext-jdk16<1.66
1.66
maven/org.bouncycastle:bcprov-ext-jdk15on<1.66
1.66
maven/org.bouncycastle:bc-fips<=1.0.2
1.0.2.1
redhat/bouncycastle<1.66
1.66
Bouncy Castle<1.8.7
Bouncy Castle<1.0.1.1
Bouncy Castle Crypto Package<1.0.1.2
Bouncy Castle Crypto Package>=1.0.2<1.0.2.1
Bouncy Castle bc-java<1.66

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID of this flaw in bouncycastle?

    The vulnerability ID is CVE-2020-15522.

  • What is the severity rating of CVE-2020-15522?

    The severity rating of CVE-2020-15522 is medium with a CVSS score of 5.9.

  • Which software versions are affected by CVE-2020-15522?

    Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.2.1, BC before 1.66, BC-FNA before 1.0.1.1.

  • How can this vulnerability be fixed?

    To fix CVE-2020-15522, update Bouncy Castle BC Java to version 1.66 or higher, BC C# .NET to version 1.8.7 or higher, BC-FJA to version 1.0.2.1 or higher, and BC-FNA to version 1.0.1.1 or higher.

  • Where can I find more information about CVE-2020-15522?

    More information about CVE-2020-15522 can be found at the following references: [NIST NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-15522), [GitHub - bc-csharp](https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522), [GitHub - bc-java](https://github.com/bcgit/bc-java/wiki/CVE-2020-15522).

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