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CVE-2020-15522

Affected software4 products, listed below
Severity5.9 Medium CVSS 3.1 2 scores
Fixed in1.0.2.1
WeaknessCWE-362
Published20 May 2021
Updated17 Jun 2026

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.

CWE-203

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 1.5% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

A public code fix exists.

  • Protection none
  • Action unverified
  • Review automated Upstream data
  • Record active
Decided by Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all
Finding This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious.

CVSS

5.9 MEDIUM v3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 5.9 MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N NVD Primary published
CVSS 2.0 4.3 none AV:N/AC:M/Au:N/C:P/I:N/A:N NVD Primary

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Patch Update April 2023 ↗ CPU 2023-Q2 Oracle JD Edwards / E1 IOT Orchestrator Security (jruby) (Prior to 9.2.7.3)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle JD Edwards E1 IOT Orchestrator Security (jruby) Prior to 9.2.7.3

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.bouncycastle:bc-fips 0 1.0.2.1 unbounded
org.bouncycastle:bcprov-ext-jdk15on 0 1.66 unbounded
org.bouncycastle:bcprov-ext-jdk16 0 1.66 unbounded
org.bouncycastle:bcprov-jdk14 0 1.66 unbounded
org.bouncycastle:bcprov-jdk15 0 1.66 unbounded
org.bouncycastle:bcprov-jdk15on 0 1.66 unbounded
org.bouncycastle:bcprov-jdk15to18 0 1.66 unbounded
org.bouncycastle:bcprov-jdk16 0 1.66 unbounded

Products and versions

12 products, 13 version entries
SourceVendorProductSchemeAffected versions
nvd bouncycastle bc-csharp generic < 1.8.7
nvd bouncycastle bouncy castle fips .net api generic < 1.0.1.1
nvd bouncycastle fips java api generic < 1.0.1.2 · ≥ 1.0.2 and < 1.0.2.1
nvd bouncycastle the bouncy castle crypto package for java generic < 1.66
osv org.bouncycastle bc-fips generic < 1.0.2.1
osv org.bouncycastle bcprov-ext-jdk15on generic < 1.66
osv org.bouncycastle bcprov-ext-jdk16 generic < 1.66
osv org.bouncycastle bcprov-jdk14 generic < 1.66
osv org.bouncycastle bcprov-jdk15 generic < 1.66
osv org.bouncycastle bcprov-jdk15on generic < 1.66
osv org.bouncycastle bcprov-jdk15to18 generic < 1.66
osv org.bouncycastle bcprov-jdk16 generic < 1.66

References

URLTags
https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522 WEB
https://github.com/bcgit/bc-java/wiki/CVE-2020-15522 WEB
https://security.netapp.com/advisory/ntap-20210622-0007 WEB
https://www.bouncycastle.org/releasenotes.html WEB
https://security.netapp.com/advisory/ntap-20210622-0007/

Timeline

Published2021-05-20By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.