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Full vulnerability report · 2021
CVE-2020-15522High confidence

n/a — Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

n/a · n/a

5.9MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2020-15522 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitybouncycastle: Timing issue within the EC math library
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • bouncycastle as a component of Red Hat Integration Camel Quarkus 1
  • bouncycastle as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack
  • bouncycastle as a component of Red Hat OpenShift Application Runtimes
  • bouncycastle as a component of Red Hat Single Sign-On 7
  • bouncycastle as a component of Red Hat support for Spring Boot
Summary
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.
Remediation
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-1608

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

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.

What

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.

Why

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-362 ↗

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'). The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-362
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

CERT-FR · French · CERTFR-2026-AVI-0556Multiples vulnérabilités dans les produits VMware

d?id=CVE-2020-13955 Référence CVE CVE-2020-13956 https://www.cve.org/CVERecord?id=CVE-2020-13956 Référence CVE CVE-2020-13957 https://www.cve.org/CVERecord?id=CVE-2020-13957 Référence CVE CVE-2020-13959 https://www.cve.org/CVERecord?id=CVE-2020-13959 Référence CVE CVE-2020-14060 https://www.cve.org/CVERecord?id=CVE-2020-14060 Référence CVE CVE-2020-14061 https://www.cve.org/CVERecord?id=CVE-2020-14061 Référence CVE CVE-2020-14062 https://www.cve.org/CVERecord?id=CVE-2020-14062 Référence CVE CVE-2020-14195 https://www.cve.org/CVERecord?id=CVE-2020-14195 Référence CVE CVE-2020-15250 https://www.cve.org/CVERecord?id=CVE-2020-15250 Référence CVE CVE-2020-15522 https://www.cve.org/CVERecord?id=CVE-2020-15522 Référence CVE CVE-2020-1945 https://www.cve.org/CVERecord?id=CVE-2020-1945 Référence CVE CVE-2020-24616 https://www.cve.org/CVERecord?id=CVE-2020-24616 Référence CVE CVE-2020-24750 https://www.cve.org/CVERecord?id=CVE-2020-24750 Référence CVE CVE-2020-25649 https://www.cve.org/CVERecord?id=CVE-2020-25649 Référence CVE CVE-2020-26939 https://www.cve.org/CVERecord?id=CVE-2020-26939 Référence CVE CVE-2020-35490 https://www.cve.org/CVERecord?id=CVE-2020-35490 Référence CVE CVE-2020-35491 https://www.cve.org/CVERecord?id=CVE-2020-35491 Référence CVE CVE-2020-35728 https://www.cve.org/CVERecord?id=CV

Official advisory
CERT-FR · French · CERTFR-2022-AVI-952Multiples vulnérabilités dans IBM QRadar

nt été découvertes dans IBM QRadar. Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, une exécution de code arbitraire à distance et un déni de service à distance. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité IBM 6831853 du 25 octobre 2022 https://www.ibm.com/support/pages/node/6831853 Bulletin de sécurité IBM 6831855 du 25 octobre 2022 https://www.ibm.com/support/pages/node/6831855 Référence CVE CVE-2018-25032 https://www.cve.org/CVERecord?id=CVE-2018-25032 Référence CVE CVE-2020-15522 https://www.cve.org/CVERecord?id=CVE-2020-15522 Référence CVE CVE-2021-33036 https://www.cve.org/CVERecord?id=CVE-2021-33036 Référence CVE CVE-2021-3634 https://www.cve.org/CVERecord?id=CVE-2021-3634 Référence CVE CVE-2021-37404 https://www.cve.org/CVERecord?id=CVE-2021-37404 Référence CVE CVE-2021-38185 https://www.cve.org/CVERecord?id=CVE-2021-38185 Référence CVE CVE-2022-0492 https://www.cve.org/CVERecord?id=CVE-2022-0492 Référence CVE CVE-2022-1154 https://www.cve.org/CVERecord?id=CVE-2022-1154 Référence CVE CVE-2022-1271 https://www.cve.org/CVERecord?id=CVE-2022-1271 Référence CVE CVE-2022-1552 https://www.cve.org/CVERecord?id=CVE-2022-

Official advisory
CERT-FR · French · CERTFR-2021-AVI-951Multiples vulnérabilités dans le noyau Linux de RedHat

décembre 2021 https://access.redhat.com/errata/RHSA-2021:5138 Bulletin de sécurité RedHat RHSA-2021:5101 du 14 décembre 2021 https://access.redhat.com/errata/RHBA-2021:5101 Référence CVE CVE-2019-10744 https://www.cve.org/CVERecord?id=CVE-2019-10744 Référence CVE CVE-2019-12415 https://www.cve.org/CVERecord?id=CVE-2019-12415 Référence CVE CVE-2020-11987 https://www.cve.org/CVERecord?id=CVE-2020-11987 Référence CVE CVE-2020-11988 https://www.cve.org/CVERecord?id=CVE-2020-11988 Référence CVE CVE-2020-13943 https://www.cve.org/CVERecord?id=CVE-2020-13943 Référence CVE CVE-2020-13949 https://www.cve.org/CVERecord?id=CVE-2020-13949 Référence CVE CVE-2020-15522 https://www.cve.org/CVERecord?id=CVE-2020-15522 Référence CVE CVE-2020-17521 https://www.cve.org/CVERecord?id=CVE-2020-17521 Référence CVE CVE-2020-17527 https://www.cve.org/CVERecord?id=CVE-2020-17527 Référence CVE CVE-2020-26217 https://www.cve.org/CVERecord?id=CVE-2020-26217 Référence CVE CVE-2020-26259 https://www.cve.org/CVERecord?id=CVE-2020-26259 Référence CVE CVE-2020-27218 https://www.cve.org/CVERecord?id=CVE-2020-27218 Référence CVE CVE-2020-27223 https://www.cve.org/CVERecord?id=CVE-2020-27223 Référence CVE CVE-2020-27782 https://www.cve.org/CVERecord?id=CVE-2020-27782 Référence CVE CVE-2020-28491 https://www.cve.org/CVERecord?id=

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
bouncycastle as a component of Red Hat Integration Camel Quarkus 1; bouncycastle as a component of Red Hat JBoss Enterprise Application Platform Expansion Pack; bouncycastle as a component of Red Hat OpenShift Application Runtimes; bouncycastle as a component of Red Hat Single Sign-On 7; bouncycastle as a component of Red Hat support for Spring Boot
Fixed
RHINT Camel-K 1.6.4; RHINT Camel-Q 2.2.1; Red Hat EAP-XP 2.0.0 via EAP 7.3.x base; Red Hat Fuse 7.10; Red Hat Fuse 7.8.1
Action
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 20 May 2021 · Last source change 4 Aug 2024, 13:15 UTC · CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-1608
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2021-1608↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-15522 · cve.blacktree.nl