CVE-2009-4186 Denial of service in n/a

Critical 9.3 Published 3 Dec 2009 Updated 7 Aug 2024

Remote attackers can crash Apple Safari on Windows by sending a long URI in a CSS background property, requiring user interaction to visit the malicious page.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2009-4186?

CVE-2009-4186 is a critical denial of service vulnerability in Apple Safari, published on 3 Dec 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-119

Which versions are affected by CVE-2009-4186?

It affects 1 product.

Products include Apple Safari.

How do I fix CVE-2009-4186?

No fix has been published for CVE-2009-4186 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2009-4186 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-4186 exists.

Public exploit code: 1 Exploit-DB entry.

All Apple Safari vulnerabilities

Sources

Also known as GHSA-2p64-hc8v-gh2f.