#VU27496 Buffer overflow in Qt - CVE-2018-19869

Vulnerability identifier: #VU27496

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-19869

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Qt
Universal components / Libraries / Scripting languages

Vendor: Trolltech

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing SVG images within the qsvghandler.cpp file in Qt. A remote attacker can create a specially crafted image, pass it to he application that uses Qt library for SVG processing, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Qt: 5.11.0 - 5.11.2

---

External links
https://lists.opensuse.org/opensuse-security-announce/2019-04/msg00008.html
https://access.redhat.com/errata/RHSA-2019:2135
https://blog.qt.io/blog/2018/12/04/qt-5-11-3-released-important-security-updates/
https://codereview.qt-project.org/#/c/234142/
https://lists.debian.org/debian-lts-announce/2019/05/msg00014.html

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.