Home/CVE/An out-of-bounds memory access in the generateDirectionalRuns() function in qtextengine.cpp in Qt qtbase 5.11.x and 5.12
CVE

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

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.

MEDIUM · CVSS 4.3 EPSS 0.01749
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

3
qt qtbase>= 5.11.0 and <= 5.11.3
qt qtbase>= 5.12.0 and < 5.12.5
debian linuxall versions
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD23 Oct 2019 · 03:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
⚑

Vendor Advisories

2
usnUSN-4275-1
rhsaRHSA-2020:1665Low
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugreports.qt.io/browse/QTBUG-77819Permissions Required
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784Issue TrackingThird Party Advisory
https://codereview.qt-project.org/c/qt/qtbase/+/271889PatchVendor Advisory
https://seclists.org/bugtraq/2019/Nov/4Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202003-60
https://usn.ubuntu.com/4275-1/
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