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qt5: incorrectly calls SSL_shutdown() in OpenSSL mid-handshake causing denial of service in TLS applications

🗓️ 04 Nov 2020 01:33:51Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 5 Views

Qt5 mishandles OpenSSL error queue during TLS handshakes, causing denial of service in QSslSocket.

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Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8aarch64qt5-assistant0:5.12.5-2.el8qt5-assistant-0:5.12.5-2.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64leqt5-assistant0:5.12.5-2.el8qt5-assistant-0:5.12.5-2.el8.ppc64le.rpm
Red Hat Enterprise Linux8s390xqt5-assistant0:5.12.5-2.el8qt5-assistant-0:5.12.5-2.el8.s390x.rpm
Red Hat Enterprise Linux8x86_64qt5-assistant0:5.12.5-2.el8qt5-assistant-0:5.12.5-2.el8.x86_64.rpm
Red Hat Enterprise Linux8aarch64qt5-assistant-debuginfo0:5.12.5-2.el8qt5-assistant-debuginfo-0:5.12.5-2.el8.aarch64.rpm
Red Hat Enterprise Linux8ppc64leqt5-assistant-debuginfo0:5.12.5-2.el8qt5-assistant-debuginfo-0:5.12.5-2.el8.ppc64le.rpm
Red Hat Enterprise Linux8s390xqt5-assistant-debuginfo0:5.12.5-2.el8qt5-assistant-debuginfo-0:5.12.5-2.el8.s390x.rpm
Red Hat Enterprise Linux8x86_64qt5-assistant-debuginfo0:5.12.5-2.el8qt5-assistant-debuginfo-0:5.12.5-2.el8.x86_64.rpm
Red Hat Enterprise Linux8anyqt5-assistant-debuginfo0:5.12.5-2.el8.i686qt5-assistant-debuginfo-0:5.12.5-2.el8.i686.noarch.rpm
Red Hat Enterprise Linux8aarch64qt5-designer0:5.12.5-2.el8qt5-designer-0:5.12.5-2.el8.aarch64.rpm
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27 Jun 2026 08:05Current
5.7Medium risk
Vulners AI Score5.7
CVSS 25
CVSS 3.17.5
EPSS0.03012
5