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9.3

Safari 4.0.3 on Windows crashes with long CSS URL

CVE-2009-4186 · published 16 years ago
Summary

Apple Safari version 4.0.3 for Windows can be forced to stop working if a web page includes an unusually long address in a CSS background setting. This causes the browser to run out of memory and close, interrupting any user activity. Updating Safari or avoiding such pages eliminates the risk.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
apple safari 4.0.3
cpe:2.3:a:apple:safari:4.0.3:*:*:*:*:*:*:*
Original advisory text
Stack consumption vulnerability in Apple Safari 4.0.3 on Windows allows remote attackers to cause a denial of service (application crash) via a long URI value (aka url) in the Cascading Style Sheet...
Stack consumption vulnerability in Apple Safari 4.0.3 on Windows allows remote attackers to cause a denial of service (application crash) via a long URI value (aka url) in the Cascading Style Sheets (CSS) background property.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker full control (estimated)
Severity
9.3 Critical
Exploitation
7% chance of attack within 30 days
Type
CWE-119Buffer Overflow
Timeline
Published3 Dec 2009
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2009-4186 · NVD
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