Описание
An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code.
If the function was called with malformed data, for example, an URL that
contained a "charset" parameter that lacked a value (such as
"data:charset,"), and Qt was built with assertions enabled, then it would hit an assertion, resulting in a denial of service
(abort).
This impacts Qt up to 5.15.18, 6.0.0->6.5.8, 6.6.0->6.8.3 and 6.9.0. This has been fixed in 5.15.19, 6.5.9, 6.8.4 and 6.9.1.
A flaw was found in QtCore's qDecodeDataUrl() function. This vulnerability allows an application level denial of service via a malformed data URL with a missing charset value when assertions are enabled.
Отчет
Within regulated environments, a combination of the following controls acts as a significant barrier to successful exploitation of a CWE-20: Improper Input Validation or a CWE-617: Reachable Assertion vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low. Red Hat enforces the principle of least functionality, ensuring that only essential features, services, and ports are enabled. This minimizes the number of components that could be affected by input validation vulnerabilities. Security testing, static analysis, and peer reviews validate input handling and identify unsafe assertions or insecure constructs, which are excluded from production to prevent system disruption or logic exposure. Process isolation ensures that processes handling potentially malicious or unvalidated inputs run in isolated environments by separating execution domains for each process. Malicious code protections such as IPS/IDS and antimalware solutions help detect and mitigate malicious payloads stemming from input validation vulnerabilities. Finally, robust input validation and error-handling mechanisms ensure all user inputs are thoroughly validated, preventing improperly validated inputs from causing system instability, exposing sensitive data, or escalating risks further
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 8 | qt5 | Fix deferred | ||
| Red Hat Enterprise Linux 10 | qt6-qtbase | Fixed | RHSA-2025:9486 | 24.06.2025 |
| Red Hat Enterprise Linux 9 | qt5-qtbase | Fixed | RHSA-2025:9462 | 24.06.2025 |
| Red Hat Enterprise Linux 9.4 Extended Update Support | qt5-qtbase | Fixed | RHSA-2025:11841 | 28.07.2025 |
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Дополнительная информация
Статус:
EPSS
5.3 Medium
CVSS3
Связанные уязвимости
An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code. If the function was called with malformed data, for example, an URL that contained a "charset" parameter that lacked a value (such as "data:charset,"), and Qt was built with assertions enabled, then it would hit an assertion, resulting in a denial of service (abort). This impacts Qt up to 5.15.18, 6.0.0->6.5.8, 6.6.0->6.8.3 and 6.9.0. This has been fixed in 5.15.19, 6.5.9, 6.8.4 and 6.9.1.
An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code. If the function was called with malformed data, for example, an URL that contained a "charset" parameter that lacked a value (such as "data:charset,"), and Qt was built with assertions enabled, then it would hit an assertion, resulting in a denial of service (abort). This impacts Qt up to 5.15.18, 6.0.0->6.5.8, 6.6.0->6.8.3 and 6.9.0. This has been fixed in 5.15.19, 6.5.9, 6.8.4 and 6.9.1.
Possible denial of service when passing malformed data in a URL to qDecodeDataUrl
An issue was found in the private API function qDecodeDataUrl() in QtC ...
EPSS
5.3 Medium
CVSS3