CVE-2022-32784: Apple Safari Information Disclosure Flaw

CVE-2022-32784 Overview

CVE-2022-32784 is an information disclosure vulnerability affecting Apple Safari, iOS, and iPadOS. The vulnerability stems from improper UI handling within the affected products. When a user visits a maliciously crafted website, an attacker can exploit this flaw to leak sensitive data from the user's device. Apple addressed this issue with improved UI handling in Safari 15.6, iOS 15.6, and iPadOS 15.6.

Critical Impact

Visiting a maliciously crafted website may allow attackers to leak sensitive user data through improper UI handling, potentially exposing confidential information without the user's knowledge.

Affected Products

• Apple Safari (versions prior to 15.6)
• Apple iOS (versions prior to 15.6)
• Apple iPadOS (versions prior to 15.6)

Discovery Timeline

• 2023-02-27 - CVE-2022-32784 published to NVD
• 2025-03-11 - Last updated in NVD database

Technical Details for CVE-2022-32784

Vulnerability Analysis

This vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), indicating that improper handling of the user interface allows sensitive data to be exposed to malicious websites. The flaw exists in how Safari and iOS/iPadOS process and render certain UI elements when interacting with web content. When a user navigates to an attacker-controlled website, the vulnerability can be triggered through specially crafted web elements that exploit the improper UI handling mechanism.

The vulnerability requires user interaction—specifically, the victim must visit a malicious website. However, no authentication or special privileges are required by the attacker, making it relatively straightforward to exploit in phishing scenarios or through compromised legitimate websites.

Root Cause

The root cause of CVE-2022-32784 lies in inadequate UI handling mechanisms within Safari's rendering engine. When processing certain web content, the browser failed to properly isolate or sanitize UI state information, allowing malicious scripts or web elements to access or infer sensitive data that should remain protected from cross-origin access. Apple resolved this by implementing improved UI handling routines that properly enforce data isolation boundaries.

Attack Vector

The attack vector for this vulnerability is network-based, requiring the victim to visit a maliciously crafted website. An attacker would typically:

1. Create or compromise a website with specially crafted content designed to exploit the UI handling flaw
2. Lure victims to the malicious site through phishing emails, social media links, or malvertising
3. When the victim's browser renders the malicious content, the exploit triggers the UI handling vulnerability
4. Sensitive data from the victim's browsing session or device is leaked to the attacker's server

The vulnerability does not require any special privileges on the attacker's part, though it does require user interaction in the form of visiting the malicious site.

Detection Methods for CVE-2022-32784

Indicators of Compromise

• Unusual outbound network connections from Safari or WebKit processes to unknown external servers
• Unexpected JavaScript execution patterns when visiting certain websites
• Browser process accessing sensitive data or system resources beyond normal scope
• Anomalous UI rendering behavior or brief visual artifacts during web page loading

Detection Strategies

• Monitor Safari and WebKit process behavior for unusual data access patterns or network activity
• Implement web filtering to block access to known malicious domains exploiting this vulnerability
• Deploy endpoint detection solutions capable of identifying abnormal browser behavior
• Review browser logs for signs of exploitation attempts or suspicious web content rendering

Monitoring Recommendations

• Enable comprehensive logging for Safari and iOS/iPadOS system events
• Monitor for connections to suspicious or newly registered domains
• Track browser version information across managed devices to identify unpatched systems
• Implement network traffic analysis to detect potential data exfiltration patterns

How to Mitigate CVE-2022-32784

Immediate Actions Required

• Update Safari to version 15.6 or later immediately
• Update iOS devices to version 15.6 or later
• Update iPadOS devices to version 15.6 or later
• Advise users to avoid clicking links from untrusted sources until patches are applied
• Consider implementing web content filtering to block known malicious sites

Patch Information

Apple has released security updates to address this vulnerability. The patches are available through the following official channels:

• Safari 15.6: Available for macOS Big Sur and macOS Catalina. Details available in Apple Support Article HT213341
• iOS 15.6 and iPadOS 15.6: Available for iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation). Details available in Apple Support Article HT213346

Organizations should prioritize deploying these updates through their mobile device management (MDM) solutions for managed devices.

Workarounds

• Use an alternative browser on macOS systems until Safari can be updated
• Implement strict web filtering policies to block access to untrusted websites
• Enable "Prevent Cross-Site Tracking" and other privacy features in Safari preferences
• Consider using a VPN or secure web gateway that can inspect and filter malicious content
• Educate users about the risks of clicking unknown links until devices are patched

# Check Safari version on macOS
/Applications/Safari.app/Contents/MacOS/Safari --version

# Verify iOS/iPadOS version via command line (for managed devices)
# Use MDM tools to query device software versions
# Ensure all devices report iOS/iPadOS 15.6 or higher