CVE-2023-34973 in QTS
Summary
by MITRE • 08/24/2023
An insufficient entropy vulnerability has been reported to affect QNAP operating systems. If exploited, the vulnerability possibly allows remote users to predict secret via unspecified vectors.
We have already fixed the vulnerability in the following versions: QTS 5.0.1.2425 build 20230609 and later QTS 5.1.0.2444 build 20230629 and later QuTS hero h5.1.0.2424 build 20230609 and later
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Analysis
by VulDB Data Team • 09/20/2023
The vulnerability identified as CVE-2023-34973 represents a critical insufficient entropy flaw within QNAP operating systems that compromises the cryptographic security foundations of affected devices. This weakness specifically targets the random number generation mechanisms used by the system to create cryptographic secrets, session identifiers, and other security-critical values. The vulnerability stems from inadequate entropy sources during the initialization and operation of cryptographic functions, creating predictable patterns that malicious actors can exploit to compromise system security. The issue affects multiple QNAP operating system variants including QTS 5.0.1 and 5.1 series, as well as the QuTS hero platform, indicating a widespread impact across the vendor's product portfolio.
The technical nature of this vulnerability aligns with CWE-330, which specifically addresses insufficient entropy in cryptographic systems. When systems lack sufficient randomness in their cryptographic operations, they become vulnerable to various attack vectors including session hijacking, key recovery attacks, and privilege escalation attempts. The unspecified vectors mentioned in the description suggest that the vulnerability may manifest through multiple attack paths including network-based exploitation, where remote adversaries can observe system behavior patterns to predict cryptographic outputs. This weakness directly undermines the fundamental security principles of cryptographic systems by allowing attackers to reverse-engineer secret values that should remain unpredictable and secure.
From an operational perspective, this vulnerability creates significant risk for QNAP device users who rely on these systems for network storage and security functions. Remote attackers who successfully exploit this vulnerability can potentially gain unauthorized access to network-attached storage systems, compromise user sessions, and escalate privileges within the affected environments. The impact extends beyond simple data theft to include potential system compromise and lateral movement within network infrastructures. Organizations using QNAP devices in critical environments face heightened risk of unauthorized data access and system manipulation, particularly in scenarios where these devices serve as primary storage solutions for sensitive corporate or personal data.
The remediation efforts have been effectively addressed through updates to specific QNAP operating system versions as outlined in the advisory. Systems running QTS 5.0.1.2425 build 20230609 and later, QTS 5.1.0.2444 build 20230629 and later, and QuTS hero h5.1.0.2424 build 20230609 and later have been patched to address the entropy generation issues. Security administrators should prioritize immediate deployment of these updates across all affected systems to eliminate the vulnerability. The fix likely involves improvements to the underlying random number generation algorithms and entropy collection mechanisms, ensuring that cryptographic operations utilize sufficient entropy sources to maintain security properties. Organizations should also consider implementing additional monitoring and detection measures to identify any potential exploitation attempts before the patches are deployed, as this vulnerability could be actively targeted by threat actors seeking to compromise QNAP installations.