CVE-2009-4186

Safari 4.0.3 - Denial of Service via Long CSS Background URI

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-4186. PoCs published by Jeremy Brown.

AI-analyzed exploit summary This exploit triggers a stack overflow in Safari 4.0.3 (Win32) by crafting a malicious CSS file with an excessively long URL in the background property, leading to a denial of service (DoS). The PoC generates an HTML file and a CSS file with a large 'A' repeated string to exploit the vulnerability.

Description

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Jeremy Brown · perldoswindows_x86
https://www.exploit-db.com/exploits/10102

This exploit triggers a stack overflow in Safari 4.0.3 (Win32) by crafting a malicious CSS file with an excessively long URL in the background property, leading to a denial of service (DoS). The PoC generates an HTML file and a CSS file with a large 'A' repeated string to exploit the vulnerability.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Safari 4.0.3 (Win32)
No auth needed
Prerequisites: Victim must open the crafted HTML file in Safari 4.0.3 on Windows
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/54487
Exploit exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/10102
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/37039

Scores

EPSS 0.0653
EPSS Percentile 92.9%

Details

CWE
CWE-119
Status published
Products (1)
apple/safari 4.0.3
Published Dec 03, 2009
Tracked Since Feb 18, 2026