CVE-2024-53693
Published: 07 March 2025
Summary
CVE-2024-53693 is a high-severity CRLF Injection (CWE-93) vulnerability in Qnap Quts Hero. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Application or System Exploitation (T1499.004); ranked in the top 37.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly addresses the improper neutralization of CRLF sequences by requiring validation and sanitization of user inputs to prevent injection attacks.
Ensures timely remediation of the specific CRLF injection flaw through patching, as demonstrated by QNAP's release of fixed versions.
Restricts and filters user inputs to block CRLF sequences and other malicious patterns that could lead to application data modification.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
CRLF injection vuln with high availability impact (A:H) and ability to modify application data enables post-access exploitation for endpoint DoS via application/system exploitation.
NVD Description
An improper neutralization of CRLF sequences ('CRLF Injection') vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained user access to modify application data. We have already fixed…
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the vulnerability in the following versions: QTS 5.2.3.3006 build 20250108 and later QuTS hero h5.2.3.3006 build 20250108 and later
Deeper analysisAI
CVE-2024-53693 is an improper neutralization of CRLF sequences (CRLF Injection) vulnerability affecting several versions of QNAP operating systems, including QTS and QuTS hero. The issue stems from inadequate handling of CRLF sequences, as indicated by associated CWEs such as CWE-93, CWE-94, and CWE-400. It carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H), highlighting its potential for high availability impact with low complexity and privileges required.
Remote attackers who have already gained user-level access can exploit this vulnerability over the network without user interaction. Successful exploitation allows them to modify application data, potentially leading to disruptions aligned with the high availability impact in the CVSS score.
QNAP has addressed the vulnerability in updated versions: QTS 5.2.3.3006 build 20250108 and later, and QuTS hero h5.2.3.3006 build 20250108 and later. Additional details on mitigation and affected versions are available in the QNAP security advisory at https://www.qnap.com/en/security-advisory/qsa-24-54.
Details
- CWE(s)