CVE Vulnerability

CVE-2018-21035

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).

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugreports.qt.io/browse/QTBUG-70693 Exploit Third Party Advisory
https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
Information

Published : 2020-02-28 09:15

Updated : 2020-08-24 05:37

NVD link : CVE-2018-21035

Mitre link : CVE-2018-21035

Products Affected
No products.
CWE
CWE-770