Denial of Service Vulnerability in Qt WebSocket Implementation
CVE-2018-21035

8.6HIGH

Key Information:

Vendor

Qt

Status
Qt
Vendor
CVE Published:
28 February 2020

What is CVE-2018-21035?

The WebSocket implementation in Qt versions through 5.14.1 permits the acceptance of frames and messages up to 2GB in size, with no possibility of configuring smaller limits. This vulnerability could enable attackers to exploit memory consumption, potentially leading to a denial of service condition.

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References

https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735
x_refsource_MISC
https://bugreports.qt.io/browse/QTBUG-70693
x_refsource_MISC

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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