REDHAT-BUG-2015648
First published: Tue Oct 19 2021(Updated: )
It was discovered that the default TLS cipher suite configuration in the JSSE component of OpenJDK preferred certain weak ciphers over stronger ciphers. This issue was addressed by: - Preferring ciphers with forward secrecy. - Lowering priority of ciphers using RSA encryption key exchange. - Lowering priority of ciphers using SHA-1 hashing algorithm. Upstream commit: <a href="https://github.com/openjdk/jdk11u/commit/af4b37301d33723806c38cf8ae5d85b7fa7ef39f">https://github.com/openjdk/jdk11u/commit/af4b37301d33723806c38cf8ae5d85b7fa7ef39f</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sun JSSE |
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Reference Links
- https://github.com/openjdk/jdk11u/commit/af4b37301d33723806c38cf8ae5d85b7fa7ef39f
- https://bugs.openjdk.java.net/browse/JDK-8163326
- https://www.oracle.com/java/technologies/javase/11-0-13-relnotes.html
- https://www.oracle.com/java/technologies/javase/8u311-relnotes.html
- https://www.oracle.com/security-alerts/cpuoct2021.html#AppendixJAVA
- https://access.redhat.com/errata/RHSA-2021:3886
- https://access.redhat.com/errata/RHSA-2021:3884
- https://access.redhat.com/errata/RHSA-2021:3885
- https://access.redhat.com/errata/RHSA-2021:3893
- https://access.redhat.com/errata/RHSA-2021:3887
- https://access.redhat.com/errata/RHSA-2021:3891
- https://access.redhat.com/security/cve/cve-2021-35550
- https://access.redhat.com/errata/RHSA-2021:3889
- https://access.redhat.com/errata/RHSA-2021:3892
- https://access.redhat.com/errata/RHSA-2021:3960
- https://access.redhat.com/errata/RHSA-2021:3961
- https://access.redhat.com/errata/RHSA-2021:3967
- https://access.redhat.com/errata/RHSA-2021:3968
- https://github.com/openjdk/jdk11u-dev/commit/af4b37301d33723806c38cf8ae5d85b7fa7ef39f
- http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/f60ef263eb92
- https://access.redhat.com/errata/RHSA-2022:0970
- https://access.redhat.com/errata/RHSA-2022:0969
- https://access.redhat.com/errata/RHSA-2022:0968
- https://bugzilla.redhat.com/show_bug.cgi?id=2015648
Frequently Asked Questions
What is the severity of REDHAT-BUG-2015648?
The severity of REDHAT-BUG-2015648 is significant due to the preference for weak TLS ciphers which can lead to potential security vulnerabilities.
How do I fix REDHAT-BUG-2015648?
To fix REDHAT-BUG-2015648, update your OpenJDK JSSE to the latest version where the cipher suite configuration is corrected.
What are the risks associated with REDHAT-BUG-2015648?
The risks associated with REDHAT-BUG-2015648 include data interception and denial of service due to the use of weak TLS ciphers.
Which versions of OpenJDK are affected by REDHAT-BUG-2015648?
OpenJDK JSSE versions prior to the patch addressing REDHAT-BUG-2015648 are affected.
What changes were made to resolve REDHAT-BUG-2015648?
The changes made to resolve REDHAT-BUG-2015648 include preferring ciphers with forward secrecy and lowering the priority of ciphers using RSA encryption.
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