Full Report
CVE-2024-23204 sheds light on the critical importance of continuous security vigilance. Apple's Shortcuts application, designed to enhance user automation, can inadvertently become a potential vector for privacy breaches. This analysis aims to provide users, developers, and security professionals with insights into the nature of the vulnerability, its potential impact, and recommended mitigation measures. At a glance: * We have discovered a vulnerability in Apple Shortcuts that lets a potent
Analysis Summary
# Vulnerability: Apple Shortcuts TCC Bypass Leading to Sensitive Data Exposure
## CVE Details
- CVE ID: CVE-2024-23204
- CVSS Score: 7.5 (High)
- CWE: Insufficient Authorization (Implied, due to TCC bypass)
## Affected Systems
- Products: Apple Shortcuts application on macOS, iOS, and iPadOS.
- Versions:
- macOS versions prior to 14.3 (Sonoma)
- iOS versions prior to 17.3
- iPadOS versions prior to 17.3
- Configurations: Any system running the affected Shortcut application versions where a malicious shortcut is executed.
## Vulnerability Description
The vulnerability resides within the Apple Shortcuts application and allows a specially crafted shortcut to bypass the Transparency, Consent, and Control (TCC) security framework. By leveraging the '**Expand URL**' function within a shortcut, an attacker can exfiltrate sensitive user data (such as Photos, Contacts, Files, and Clipboard Data) by encoding it in Base64 format and sending it to an external, attacker-controlled server/website without prompting the user for consent. The underlying execution context, potentially involving `com.apple.WorkflowKit.BackgroundShortcutRunner`, was able to access data despite sandbox restrictions.
## Exploitation
- Status: Fixed (Details suggest Responsible Disclosure; exploitation in the wild status not specified, but PoC mechanism is described).
- Complexity: Medium (Requires crafting a malicious shortcut leveraging specific actions).
- Attack Vector: Network (Data exfiltration requires network connectivity to the malicious server).
## Impact
- Confidentiality: High (Sensitive user data like photos, contacts, files can be stolen).
- Integrity: Low (No mention of ability to modify data).
- Availability: Low (No direct impact on system availability).
## Remediation
### Patches
The vulnerability was fixed through software updates implementing additional permission checks:
- macOS Sonoma 14.3 (or later)
- iOS 17.3 (or later)
- iPadOS 17.3 (or later)
### Workarounds
- Exercise extreme caution when executing or importing Shortcuts from untrusted or unknown sources.
- Ensure regular security updates are applied to all Apple devices.
## Detection
- **Indicators of Compromise (IoC):**
- Unexpected outbound network connections initiated by system processes associated with Shortcut execution (`com.apple.WorkflowKit.BackgroundShortcutRunner` or related processes) to external, unknown domains.
- Observation of Base64 encoded data strings appearing in network traffic captures targeting these external endpoints.
- **Detection Methods and Tools:**
- Network monitoring tools analyzing outbound traffic for unusual activity originating from the device.
- Endpoint detection solutions capable of tracking process behavior, specifically monitoring data access patterns following the execution of newly imported Shortcuts.
## References
- Vendor Advisory (iOS): https://support.apple.com/HT214060
- Vendor Advisory (iPadOS): https://support.apple.com/HT214059
- Vendor Advisory (macOS): https://support.apple.com/HT214061
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-23204