What it is about

Bouncy Castle ist eine Kryptographie-API für Java. Ein Angreifer kann mehrere Schwachstellen in Bouncy Castle BC-JAVA ausnutzen, um kryptografische Sicherheitsvorkehrungen zu umgehen, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.

Under what conditions?

The BSI does not name any particular preconditions.

What can happen in the worst case

An attacker could use the vulnerability to

• kryptografische Sicherheitsvorkehrungen zu umgehen
• vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen

Am I affected?

Affected according to the BSI:

• Red Hat Enterprise Linux
• SUSE Linux
• IBM SPSS Modeler
• IBM InfoSphere Information Server
• IBM MQ
• IBM QRadar SIEM
• SUSE openSUSE
• IBM License Metric Tool
• Red Hat Enterprise Linux Apache Camel for Spring Boot
• IBM Tivoli Network Manager IP Edition 4.2.0
• IBM DB2
• IBM App Connect Enterprise

and 7 more

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

• Open Source Bouncy Castle 1.84
• Open Source DBeaver 26.0.4
• Open Source Keycloak 26.6.2
• Red Hat OpenShift Dev Spaces 3.28.0
• IBM QRadar SIEM 7.5.0 UP16

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.