Vulnerability Details : CVE-2021-38593

Qt 5.x before 5.15.6 and 6.x through 6.1.2 has an out-of-bounds write in QOutlineMapper::convertPath (called from QRasterPaintEngine::fill and QPaintEngineEx::stroke).

Vulnerability category: Memory Corruption

Published 2021-08-12 02:15:07

Updated 2023-01-19 20:16:58

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-38593

Probability of exploitation activity in the next 30 days: 0.33%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 67 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-38593

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	[email protected]
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	[email protected]
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-38593

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: [email protected] (Primary)

References for CVE-2021-38593

https://lists.fedoraproject.org/archives/list/[email protected]/message/36VN2WKMNQUSTF6ZW2X52NPAJVXJ4S5I/

Mailing List;Third Party Advisory
https://wiki.qt.io/Qt_5.15_Release#Known_Issues

Issue Tracking;Release Notes;Vendor Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/qt/OSV-2021-903.yaml

Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35566

Issue Tracking;Patch;Third Party Advisory
https://github.com/qt/qtbase/commit/6b400e3147dcfd8cc3a393ace1bd118c93762e0c

Patch;Third Party Advisory
https://github.com/qt/qtbase/commit/202143ba41f6ac574f1858214ed8bf4a38b73ccd

Patch;Third Party Advisory
https://www.qt.io/blog/qt-5.15-extended-support-for-subscription-license-holders

Release Notes
https://github.com/qt/qtbase/commit/1ca02cf2879a5e1511a2f2109f0925cf4c892862

Patch;Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/HY5YCSDCTLHVMP3OXOM6HNTWHV6DBHDX/

Mailing List;Third Party Advisory

Products affected by CVE-2021-38593

QT » QT
Versions from including (>=) 6.0.0 and up to, including, (<=) 6.1.2
cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
Matching versions
QT » QT
Versions from including (>=) 5.0.0 and before (<) 5.15.6
cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 35
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 36
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
Matching versions