CVE-2024-44229 Overview
CVE-2024-44229 is an information leakage vulnerability in Apple's Safari browser and related operating systems. Apple addressed the issue with additional validation logic. The flaw allows private browsing sessions to leak portions of browsing history, undermining the privacy guarantees users expect from Safari's Private Browsing mode.
Apple resolved the issue in Safari 18.1, iOS 18.1, iPadOS 18.1, macOS Sequoia 15.1, and visionOS 2.1. The vulnerability is network-exploitable, requires no privileges, and needs no user interaction. Confidentiality impact is limited to browsing history metadata rather than credentials or session tokens.
Critical Impact
Private browsing sessions in Safari may expose fragments of browsing history to attackers or unauthorized observers, defeating the privacy expectations of Private Browsing mode.
Affected Products
- Apple iOS (versions prior to 18.1)
- Apple iPadOS (versions prior to 18.1)
- Apple visionOS (versions prior to 2.1)
Discovery Timeline
- 2024-10-28 - CVE-2024-44229 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-44229
Vulnerability Analysis
CVE-2024-44229 is an information disclosure flaw affecting Safari's Private Browsing implementation across Apple operating systems. Apple's advisory states that private browsing may leak some browsing history under specific conditions. The issue was corrected by introducing additional validation, indicating that state or context checks were missing or incomplete in the affected component.
Private Browsing in Safari is intended to isolate browsing history, cookies, and cached content from persistent storage and from other browsing sessions. When validation is insufficient, records intended to remain within an ephemeral private session can be exposed to standard browsing contexts, other tabs, or observers with access to certain browser interfaces.
Apple has not published the specific component or code path affected. The CWE classification is NVD-CWE-noinfo, reflecting the limited technical detail released. The attack is remote and requires no authentication, but the confidentiality impact is bounded to browsing history data.
Root Cause
Apple's advisory attributes the issue to missing validation. The fix adds checks that prevent private-session browsing history from being observable outside its intended scope. Without additional public detail, the root cause aligns with an information leakage class defect where session boundary enforcement was incomplete.
Attack Vector
Exploitation occurs over the network without user interaction. A malicious website or an attacker with the ability to observe browser-exposed interfaces can trigger the condition that reveals private browsing history. No credentials or elevated privileges are required. Refer to the Apple Support Document #121563 and Apple Support Document #121566 for vendor guidance.
No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS score is 0.655%.
Detection Methods for CVE-2024-44229
Indicators of Compromise
- No file-based or network-based indicators of compromise have been published by Apple or third-party researchers for this vulnerability.
- Devices running Safari, iOS, iPadOS, macOS Sequoia, or visionOS versions prior to the fixed releases should be treated as vulnerable.
Detection Strategies
- Inventory Apple endpoints and identify systems running iOS below 18.1, iPadOS below 18.1, macOS Sequoia below 15.1, visionOS below 2.1, or Safari below 18.1.
- Correlate mobile device management (MDM) compliance data against the fixed version list to identify unpatched devices.
- Monitor for unusual outbound web traffic patterns from Apple devices that may indicate exploitation attempts targeting Safari.
Monitoring Recommendations
- Enforce MDM policies that require minimum OS versions matching Apple's patched releases.
- Track Safari version reporting in browser telemetry and web application logs to identify clients running vulnerable builds.
- Review privacy-sensitive workflows (executive browsing, incident response research) for exposure to unpatched devices.
How to Mitigate CVE-2024-44229
Immediate Actions Required
- Update all Apple endpoints to iOS 18.1, iPadOS 18.1, macOS Sequoia 15.1, visionOS 2.1, or Safari 18.1 or later.
- Prioritize devices used by personnel whose browsing activity carries elevated confidentiality requirements.
- Verify patch deployment through MDM compliance reporting and browser version telemetry.
Patch Information
Apple released fixes across multiple platforms on October 28, 2024. Refer to Apple Support Document #121563, Apple Support Document #121564, Apple Support Document #121566, and Apple Support Document #121571 for platform-specific advisories and version details. Public disclosure was mirrored on the Full Disclosure mailing list.
Workarounds
- Use an alternative browser for private browsing on Apple devices that cannot be immediately updated.
- Avoid relying on Safari Private Browsing for sensitive research on unpatched systems.
- Restrict access to untrusted websites from unpatched devices through DNS filtering or secure web gateway policies.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
