#VU76666 Cleartext transmission of sensitive information in Qt - CVE-2023-32762

Vulnerability identifier: #VU76666

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-32762

CWE-ID: CWE-319

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Qt
Universal components / Libraries / Scripting languages

Vendor: Trolltech

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to Qt Network incorrectly parses the strict-transport-security (HSTS) header, allowing unencrypted connections to be established, even when explicitly prohibited by the server. A remote attacker with ability to intercept network traffic can gain access to sensitive data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Qt: 5.15.0 - 5.15.13, 6.2.0 - 6.2.8, 6.5.0

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External links
https://lists.qt-project.org/pipermail/announce/2023-May/000414.html
https://github.com/qt/qtbase/commit/1b736a815be0222f4b24289cf17575fc15707305
https://codereview.qt-project.org/c/qt/qtbase/+/476140

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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.