PT-2020-6893 · Qt Company+5 · Qt+5
Franck Dude
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Published
2018-09-23
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Updated
2021-06-23
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CVE-2018-21035
CVSS v3.1
8.6
High
| Vector | AC:L/AV:N/A:H/C:N/I:N/PR:N/S:C/UI:N |
Name of the Vulnerable Software and Affected Versions
Qt versions through 5.14.1
Description
The issue is related to the WebSocket component of the Qt cross-platform software development framework, which is associated with unlimited resource allocation. This can be exploited by a remote attacker to cause a denial of service, specifically through memory consumption. The WebSocket implementation accepts up to 2GB for frames and 2GB for messages, and smaller limits cannot be configured, making it easier for attackers to cause a denial of service.
Recommendations
For Qt versions through 5.14.1, consider configuring or implementing additional limits on resource allocation for the WebSocket component to prevent excessive memory consumption until a patch is available. As a temporary workaround, restrict access to the WebSocket implementation to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
DoS
Allocation of Resources Without Limits
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Centos
Qt
Red Hat
Rocky Linux