CVE-2019-18281: Buffer Overflow
First published: Wed Oct 23 2019(Updated: )
An 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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Qt qtbase | >=5.11.0<=5.11.3 | |
| Qt qtbase | >=5.12.0<5.12.5 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| debian/qtbase-opensource-src | 5.15.2+dfsg-9+deb11u1 5.15.8+dfsg-11+deb12u2 5.15.13+dfsg-4 | |
| debian/qtbase-opensource-src-gles | 5.15.2+dfsg-4 5.15.8+dfsg-3 5.15.13+dfsg-2 |
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Reference Links
- https://bugreports.qt.io/browse/QTBUG-77819
- https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784
- https://codereview.qt-project.org/c/qt/qtbase/+/271889
- https://seclists.org/bugtraq/2019/Nov/4
- https://security.gentoo.org/glsa/202003-60
- https://usn.ubuntu.com/4275-1/
- https://www.debian.org/security/2019/dsa-4556
- https://launchpad.net/bugs/cve/CVE-2019-18281
- https://github.com/qt/qtbase/commit/af6ac444c97ed2dc234f93fe457440c9da5482ea
- https://security-tracker.debian.org/tracker/CVE-2019-18281
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18281
- https://nvd.nist.gov/vuln/detail/CVE-2019-18281
- https://ubuntu.com/security/CVE-2019-18281
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-18281.
What is the severity of CVE-2019-18281?
The severity of CVE-2019-18281 is medium.
Which versions of Qt are affected by CVE-2019-18281?
Qt qtbase 5.11.x and 5.12.x versions before 5.12.5 are affected by CVE-2019-18281.
How can an attacker exploit CVE-2019-18281?
An attacker can exploit CVE-2019-18281 by crashing an application via a text file containing many directional characters.
Where can I find more information about CVE-2019-18281?
You can find more information about CVE-2019-18281 at the following references: [Bugreports Qt](https://bugreports.qt.io/browse/QTBUG-77819), [Launchpad](https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784), [Codereview Qt](https://codereview.qt-project.org/c/qt/qtbase/+/271889)
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