DescriptionAn issue was discovered in Qt before 5.15.14, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.1. Qt Network incorrectly parses the strict-transport-security (HSTS) header, allowing unencrypted connections to be established, even when explicitly prohibited by the server. This happens if the case used for this header does not exactly match.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qt6-base (PTS)bookworm, sid6.4.2+dfsg-10fixed
qtbase-opensource-src (PTS)buster5.11.3+dfsg1-1+deb10u5vulnerable
buster (security)5.11.3+dfsg1-1+deb10u3vulnerable
bookworm, sid5.15.8+dfsg-11fixed
qtbase-opensource-src-gles (PTS)bullseye5.15.2+dfsg-4fixed
bookworm, sid5.15.8+dfsg-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qtbase-opensource-src-glessource(unstable)(not affected)


- qtbase-opensource-src-gles <not-affected> (Not built in GLES variant)

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