CVE-2024-23228 in iOS
Summary
by MITRE • 04/24/2024
This issue was addressed through improved state management. This issue is fixed in iOS 17.3 and iPadOS 17.3. Locked Notes content may have been unexpectedly unlocked.
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Analysis
by VulDB Data Team • 04/03/2026
CVE-2024-23228 represents a security vulnerability within Apple's Notes application that affected iOS and iPadOS versions prior to 17.3. The vulnerability stemmed from inadequate state management within the Notes app's locking mechanism, creating a scenario where encrypted content could be accessed without proper authentication. This flaw specifically impacted the secure storage of locked notes, which are designed to protect sensitive information through encryption and password protection. The issue emerged from the application's failure to properly maintain the locked state of notes when certain user interactions occurred, potentially allowing unauthorized access to content that should have remained protected.
The technical root cause of this vulnerability lies in the improper handling of application states during user interactions with locked notes. When users engaged with locked notes in specific ways, the application's state management system failed to maintain the encrypted status of the content, resulting in potential exposure of sensitive data. This represents a classic state management failure that could be categorized under CWE-254, which addresses security flaws related to improper handling of application states and conditions. The vulnerability essentially created a race condition or state inconsistency where the application's internal representation of a note's locked status became decoupled from its actual security state.
The operational impact of CVE-2024-23228 extends beyond simple data exposure, as it undermines the fundamental security assumptions of the Notes application's encryption model. Users who relied on locked notes to protect confidential information, communications, or personal data faced potential privacy breaches when the application failed to maintain proper access controls. This vulnerability could be particularly concerning for individuals in professional environments where sensitive business information, personal communications, or confidential data might be stored within locked notes. The issue demonstrates how seemingly minor state management flaws can create significant security implications when they affect core application security features.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1552.001, which covers "Unsecured Credentials" and represents how improper state management can lead to credential-like access bypasses. The flaw essentially allowed unauthorized access to protected content without proper authentication, similar to how attackers might exploit weak session management to gain access to protected resources. Users who had locked notes containing sensitive information such as financial data, personal identification details, or confidential business communications could have been exposed to potential data breaches. The vulnerability's impact was particularly concerning given that it affected a core application that many users rely on for both personal and professional information storage.
Apple's fix for CVE-2024-23228 involved implementing improved state management within the Notes application to ensure that locked notes maintain their security status regardless of user interactions. This update addresses the underlying state management issues that allowed the unexpected unlocking of content, thereby restoring proper access controls for encrypted notes. The remediation demonstrates the importance of proper state management in security-critical applications and highlights how even minor implementation flaws can create significant vulnerabilities. Organizations should ensure their users update to iOS 17.3 and iPadOS 17.3 to protect against this vulnerability, as the fix directly addresses the specific state management issues that enabled unauthorized access to locked content. Users should also consider reviewing their locked notes for any potentially exposed content and implement additional security measures where necessary.