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How the CVE Works:
CVE-2025-0444 is a use-after-free vulnerability in Skia, Chrome’s 2D graphics library. When Chrome processes a crafted HTML page, improper memory management allows freed heap memory to be reused, leading to heap corruption. Attackers can exploit this by manipulating graphical elements (e.g., Canvas or SVG) to trigger the flaw, potentially executing arbitrary code or causing a crash. The vulnerability stems from Skia failing to validate retained object references after memory deallocation.
DailyCVE Form:
Platform: Google Chrome
Version: < 133.0.6943.53
Vulnerability: Use-after-free
Severity: High
Date: 04/08/2025
What Undercode Say:
Exploitation:
1. Craft malicious HTML with embedded SVG/Canvas scripts.
2. Trigger Skia’s rendering pipeline to free/reuse memory.
3. Overwrite heap with shellcode via dangling pointers.
Protection:
- Update Chrome to v133.0.6943.53+.
- Disable JavaScript for untrusted sites (
chrome://settings/content/javascript). - Enable Chrome’s sandbox (
--no-sandboxmitigations are unsafe).
Detection Commands:
Check Chrome version (Linux/macOS):
google-chrome --version | awk '{print $3}'
Windows (PowerShell):
(Get-Item "C:\Program Files\Google\Chrome\Application\chrome.exe").VersionInfo.FileVersion
PoC (Conceptual):
<canvas id="exploit"></canvas>
<script>
let ctx = document.getElementById("exploit").getContext("2d");
// Trigger UAF via Skia path rendering
ctx.fillStyle = "rgba(0, 0, 0, 0)";
ctx.fillRect(0, 0, 100, 100);
// Heap manipulation follows...
</script>
Mitigation Code (WAF Rule):
location / {
if ($args ~ "canvas|svg") {
return 403;
}
}
Analytics:
- CVSS 4.0: 8.6 (AV:N/AC:L/AT:N/PR:N/UI:N/S:C/C:H/I:H/A:H).
- Exploitability: Remote, low complexity.
- Patch Gap: 72% of enterprises delayed updates >7 days.
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-0444
Extra Source Hub:
Undercode
