CVE-2020-15522
MEDIUM5.1EPSS 0.41%Timing based private key exposure in Bouncy Castle
Published: 8/13/2021Modified: 2/4/2026
Description
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 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.
Affected packages (10)
- Debian/bouncycastlefrom 0, < 1.68-1
- Maven/org.bouncycastle:bc-fipsfrom 0, < 1.0.2.1
- Maven/org.bouncycastle:bcprov-ext-jdk15onfrom 0, < 1.66
- Maven/org.bouncycastle:bcprov-ext-jdk16from 0, < 1.66
- Maven/org.bouncycastle:bcprov-jdk14from 0, < 1.66
- Maven/org.bouncycastle:bcprov-jdk15from 0, < 1.66
- Maven/org.bouncycastle:bcprov-jdk15onfrom 0, < 1.66
- Maven/org.bouncycastle:bcprov-jdk15to18from 0, < 1.66
- Maven/org.bouncycastle:bcprov-jdk16from 0, < 1.66
- NuGet/BouncyCastlefrom 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 |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-15522
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-15522
- WEBhttps://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522
- WEBhttps://github.com/bcgit/bc-java/wiki/CVE-2020-15522
- WEBhttps://security.netapp.com/advisory/ntap-20210622-0007
- WEBhttps://www.bouncycastle.org/releasenotes.html