#VU89359 NULL pointer dereference in qt5-qtbase - CVE-2023-45935

Vulnerability identifier: #VU89359

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-45935

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
qt5-qtbase
Other software / Other software solutions

Vendor: Qt Group

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the QXcbConnection::initializeAllAtoms(). A local user can crash the application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

qt5-qtbase: 6.0.0 - 6.5.2

---

External links
https://bugreports.qt.io/browse/QTBUG-115599
https://seclists.org/fulldisclosure/2024/Jan/61

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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