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CVE-2019-18281

Date: October 23, 2019

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.

Language: C++

Severity Score

Related Resources (12)

https://usn.ubuntu.com/4275-1/
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-18281
https://access.redhat.com/security/cve/CVE-2019-18281
https://www.debian.org/security/2019/dsa-4556
https://nvd.nist.gov/vuln/detail/CVE-2019-18281
https://security-tracker.debian.org/tracker/CVE-2019-18281
https://codereview.qt-project.org/c/qt/qtbase/+/271889
https://security.gentoo.org/glsa/202003-60
https://seclists.org/bugtraq/2019/Nov/4
https://bugreports.qt.io/browse/QTBUG-77819
https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1848784
https://www.mend.io/vulnerability-database/CVE-2019-18281

Severity Score

Weakness Type (CWE)

Improper Restriction of Operations within the Bounds of a Memory Buffer

CWE-119

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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