REDHAT-BUG-2160421
First published: Thu Jan 12 2023(Updated: )
A flaw was discovered in the DTLS in JSSE component of OpenJDK, allowing malicious clients to make a DTLS server consume excessive resources by repeatedly transmitting a series of handshake initiation requests. The malicious client could also use this flaw to send pre-generated messages with a spoofed source, causing the server to send replies to a victim machine, thus potentially flooding it.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Sun JSSE |
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Reference Links
- https://github.com/openjdk/jdk17u/commit/04f32aacb592cd8f9c963278f01310a138a940ff
- https://github.com/openjdk/jdk11u/commit/57f29406b9d729a69410113518094f641c5799ea
- https://access.redhat.com/errata/RHSA-2023:0202
- https://access.redhat.com/errata/RHSA-2023:0193
- https://access.redhat.com/errata/RHSA-2023:0190
- https://access.redhat.com/errata/RHSA-2023:0199
- https://access.redhat.com/errata/RHSA-2023:0196
- https://access.redhat.com/errata/RHSA-2023:0197
- https://access.redhat.com/errata/RHSA-2023:0198
- https://access.redhat.com/errata/RHSA-2023:0201
- https://access.redhat.com/errata/RHSA-2023:0191
- https://access.redhat.com/errata/RHSA-2023:0192
- https://access.redhat.com/errata/RHSA-2023:0200
- https://www.oracle.com/security-alerts/cpujan2023.html#AppendixJAVA
- https://www.oracle.com/java/technologies/javase/11-0-18-relnotes.html
- https://www.oracle.com/java/technologies/javase/17-0-6-relnotes.html
- https://www.oracle.com/java/technologies/javase/19-0-2-relnotes.html
- https://access.redhat.com/errata/RHSA-2023:0194
- https://access.redhat.com/errata/RHSA-2023:0195
- https://access.redhat.com/errata/RHSA-2023:0353
- https://access.redhat.com/errata/RHSA-2023:0388
- https://access.redhat.com/errata/RHSA-2023:0352
- https://access.redhat.com/errata/RHSA-2023:0389
- https://access.redhat.com/security/cve/cve-2023-21835
- https://bugzilla.redhat.com/show_bug.cgi?id=2160421
Frequently Asked Questions
What is the severity of REDHAT-BUG-2160421?
The severity of REDHAT-BUG-2160421 is considered high due to its potential to exhaust server resources.
What software is affected by REDHAT-BUG-2160421?
The affected software for REDHAT-BUG-2160421 is the DTLS component of OpenJDK's JSSE.
How do I fix REDHAT-BUG-2160421?
To fix REDHAT-BUG-2160421, update your OpenJDK to the latest patched version provided by Red Hat.
Can attackers exploit REDHAT-BUG-2160421 remotely?
Yes, attackers can exploit REDHAT-BUG-2160421 remotely by sending malicious DTLS handshake requests.
What impact does REDHAT-BUG-2160421 have on DTLS servers?
REDHAT-BUG-2160421 causes DTLS servers to consume excessive resources, potentially leading to denial-of-service conditions.
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- alias/CVE-2023-21835
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- vendor/openjdk
- canonical/sun jsse