Out-of-bounds write in Qt - CVE-2021-38593
Published: August 30, 2022
Vulnerability identifier: #VU66867
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-38593
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Trolltech
Affected software:
Qt
Qt
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error when rendering SVG file within in QOutlineMapper::convertPath. A remote attacker can create a specially crafted file, trick the victim into opening it using the affected software, trigger out-of-bounds write and crash the application.
How to mitigate CVE-2021-38593
Install updates from vendor's website.
Sources
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/qt/OSV-2021-903.yaml
- https://github.com/qt/qtbase/commit/6b400e3147dcfd8cc3a393ace1bd118c93762e0c
- https://github.com/qt/qtbase/commit/1ca02cf2879a5e1511a2f2109f0925cf4c892862
- https://github.com/qt/qtbase/commit/202143ba41f6ac574f1858214ed8bf4a38b73ccd
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35566
- https://www.qt.io/blog/qt-5.15-extended-support-for-subscription-license-holders
- https://wiki.qt.io/Qt_5.15_Release#Known_Issues
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36VN2WKMNQUSTF6ZW2X52NPAJVXJ4S5I/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HY5YCSDCTLHVMP3OXOM6HNTWHV6DBHDX/