Apple WebKit Cookie Management Vulnerability Leading to Cross-Site Scripting (XSS) and Active Exploitation (CVE-2024-44309, CISA KEV)
Executive & SecOps Summary
SECOPS ASSESSMENTSystems running macOS Sequoia prior to 15.1.1, iOS/iPadOS prior to 18.1.1 and 17.7.2, and Safari prior to 18.1.1
Processing maliciously crafted web content can trigger a Cross-Site Scripting (XSS) attack due to state management flaws, with active exploitation reported on Intel-based Mac systems
Immediately apply the official software updates provided by Apple for macOS, iOS, iPadOS, and Safari
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
For enterprise macOS fleet management, use MDM solutions or execute the following terminal commands to force-install the latest security updates immediately.
# List available software updates
softwareupdate -l
# Download and install all critical security updates and restart the system
sudo softwareupdate -iaR --agree-to-license2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict outbound access to untrusted websites and enforce strict firewall configurations on endpoints.
# Enable macOS Application Layer Firewall (ALF)
sudo defaults write /Library/Preferences/com.apple.alf globalstate -int 1
sudo pfctl -E3. Log Audit & IoC Verification Commands
Run the following commands to audit the current macOS and Safari versions to verify if the system is running a vulnerable build.
# Check macOS system version
sw_vers
# Check installed Safari browser version
defaults read /Applications/Safari.app/Contents/Info.plist CFBundleShortVersionStringBlock Kernel Privilege Escalation & Ransomware Payloads Before You Can Reboot
Protect unpatched Windows, Linux, and macOS workloads against in-memory exploitation and lateral movement with autonomous EDR.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2024-44309) resides in the cookie management component of Apple's WebKit engine. Due to improper state management, the engine fails to maintain strict isolation boundaries when handling session cookies and domain states. This flaw allows an attacker to bypass the Same-Origin Policy (SOP) and execute arbitrary scripts within the context of a trusted domain.
2. Exploitation Mechanics & Attack Scenario
An attacker exploits this vulnerability by hosting a maliciously crafted web page and enticing target users to visit it. When WebKit processes the malicious content, the state management flaw is triggered, allowing the injection and execution of unauthorized scripts. Apple has acknowledged reports that this vulnerability has been actively exploited in the wild, specifically targeting Intel-based Mac systems.
3. Infrastructure & Business Impact
Successful exploitation of this vulnerability can lead to session hijacking, credential theft, and unauthorized access to sensitive corporate web applications. In an enterprise environment, compromised endpoint devices can serve as an initial access vector, allowing threat actors to pivot into internal networks and exfiltrate proprietary data.
Official Vendor Advisories & References
A cookie management issue was addressed with improved state management. This issue is fixed in Safari 18.1.1, iOS 17.7.2 and iPadOS 17.7.2, iOS 18.1.1 and iPadOS 18.1.1, macOS Sequoia 15.1.1, visionOS 2.1.1. Processing maliciously crafted web content may lead to a cross site scripting attack. Apple is aware of a report that this issue may have been actively exploited on Intel-based Mac systems.
Frequently Asked SecOps Questions (CVE-2024-44309)
FAQQ1. How critical is CVE-2024-44309 and is it actively exploited in the wild?
CVE-2024-44309 is rated CVSS 6.3 (MEDIUM) with a 30-day EPSS exploitation probability of 21.9%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2024-44309?
Primary impacted vendors include apple across safari, iphone_os, ipados, macos, visionos. Scope summary: macOS Sequoia prior to 15.1.1, iOS/iPadOS prior to 18.1.1 and 17.7.2, visionOS prior to 2.1.1, and Safari prior to 18.1.1 (Active exploitation reported on Intel-based Macs)
Q3. What temporary mitigations or workarounds exist for CVE-2024-44309 before patching?
[Mitigation] Immediately apply the official software updates provided by Apple for macOS, iOS, iPadOS, and Safari Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2024-44309
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