CVE-2019-18281

NameCVE-2019-18281
DescriptionAn out-of-bounds memory access in the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase 5.11.x and 5.12.x before 5.12.5 allows attackers to cause a denial of service by crashing an application via a text file containing many directional characters.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-4556-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qtbase-opensource-src (PTS)jessie5.3.2+dfsg-4+deb8u2fixed
jessie (security)5.3.2+dfsg-4+deb8u3fixed
stretch (security), stretch5.7.1+dfsg-3+deb9u1fixed
buster, buster (security)5.11.3+dfsg1-1+deb10u1fixed
bullseye, sid5.12.5+dfsg-2fixed
qtbase-opensource-src-gles (PTS)bullseye, sid5.12.5+dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qtbase-opensource-srcsource(unstable)5.12.5+dfsg-2
qtbase-opensource-srcsourcebuster5.11.3+dfsg1-1+deb10u1DSA-4556-1
qtbase-opensource-srcsourcejessie(not affected)
qtbase-opensource-srcsourcestretch(not affected)
qtbase-opensource-src-glessource(unstable)5.12.5+dfsg-1

Notes

[buster] - qtbase-opensource-src <no-dsa> (Minor issue)
[stretch] - qtbase-opensource-src <not-affected> (Vulnerable code not present)
[jessie] - qtbase-opensource-src <not-affected> (Vulnerable code not present)
https://github.com/qt/qtbase/commit/af6ac444c97ed2dc234f93fe457440c9da5482ea
https://bugreports.qt.io/browse/QTBUG-77819

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