Buffer overflow in Qt Qtbase
CVE-2019-18281
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.021 (80.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
- Qt Qtbase
- Debian Linux — versions 9.0, 10.0
Weakness classification (CWE)
References
- bugreports.qt.io/browse/QTBUG-77819 (Permissions Required)
- codereview.qt-project.org/c/qt/qtbase/+/271889 (Patch, Vendor Advisory)
- bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784 (Third Party Advisory, Issue Tracking)
- www.debian.org/security/2019/dsa-4556 (vendor-advisory, Third Party Advisory)
- seclists.org/bugtraq/2019/Nov/4 (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4275-1/ (vendor-advisory)
- security.gentoo.org/glsa/202003-60 (vendor-advisory)
Frequently asked questions
- What is CVE-2019-18281?
- CVE-2019-18281 is a medium-severity vulnerability in Qt Qtbase, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.3/10. Published 2019-10-23.
- How severe is CVE-2019-18281?
- Medium severity. CVSS v3 base score is 4.3 out of 10.