CVE-2018-21035
First published: Fri Feb 28 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).
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Qt Qt | <=5.14.1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
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 CVE-2018-21035?
CVE-2018-21035 is a vulnerability in the WebSocket implementation of Qt through 5.14.1.
What is the severity of CVE-2018-21035?
CVE-2018-21035 has a severity level of 7.5 (high).
How does CVE-2018-21035 affect Qt?
CVE-2018-21035 affects Qt through version 5.14.1.
What is the impact of CVE-2018-21035?
CVE-2018-21035 allows attackers to cause a denial of service by consuming excessive memory.
Is there a fix available for CVE-2018-21035?
Yes, a fix is available for CVE-2018-21035. It is recommended to update Qt to a version beyond 5.14.1.
- collector/nvd-index
- agent/weakness
- agent/author
- agent/severity
- agent/references
- agent/type
- agent/description
- agent/event
- agent/remedy
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2018-21035
- agent/first-publish-date
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/qt
- canonical/qt qt
- version/qt qt/5.14.1