REDHAT-BUG-1810964
First published: Fri Mar 06 2020(Updated: )
In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages. Smaller limits cannot be configured. This makes it easier for attackers to cause a denial of service (memory consumption). Upstream Issue: <a href="https://bugreports.qt.io/browse/QTBUG-70693">https://bugreports.qt.io/browse/QTBUG-70693</a> Upstream Fix: <a href="https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735">https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Trolltech Qt | <=5.14.1 |
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Reference Links
- https://bugreports.qt.io/browse/QTBUG-70693
- https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1810966
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1810965
- https://codereview.qt-project.org/gitweb?p=qt%2Fqtwebsockets.git;a=commit;h=ed93680f34e92ad0383aa4e610bb65689118ca93
- https://access.redhat.com/security/cve/cve-2018-21035
- https://access.redhat.com/errata/RHSA-2020:4690
- https://bugzilla.redhat.com/show_bug.cgi?id=1810964
Frequently Asked Questions
What is the severity of REDHAT-BUG-1810964?
The severity of REDHAT-BUG-1810964 is significant as it can lead to denial of service due to excessive memory consumption.
How do I fix REDHAT-BUG-1810964?
To fix REDHAT-BUG-1810964, you should update the Qt library to a version later than 5.14.1 where this issue is addressed.
Which versions of Qt are affected by REDHAT-BUG-1810964?
Qt versions up to and including 5.14.1 are affected by REDHAT-BUG-1810964.
What kind of attack does REDHAT-BUG-1810964 enable?
REDHAT-BUG-1810964 enables attackers to conduct denial of service attacks by consuming excessive memory.
Is it possible to configure the frame size limits in REDHAT-BUG-1810964?
No, in REDHAT-BUG-1810964 the WebSocket implementation does not allow configuration of smaller frame size limits.
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