Safari 4.0.2 Stack Overflow

vendor:

Safari

by:

Leon Juranic

8,8

CVSS

HIGH

Stack Overflow

119

CWE

Product Name: Safari

Affected Version From: Safari 4.0.2

Affected Version To: Safari 4.0.3

Patch Exists: YES

Related CWE: None

CPE: a:apple:safari

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows, Linux, Mac

2009

Safari 4.0.2 Stack Overflow

A stack overflow vulnerability was found in WebKit's JavaScript code that parses floating point numbers. It can be triggered with script like this: <script> var Overflow = "31337" + 0.313373133731337313373133731337...; </script> Or something like this: <img width=0.3133731337313373133731337... src="31337.jpg"> Play little bit with numbers to get a desirable return address, little bit of heap spraying, and it works.

Mitigation:

Apple updated Safari 4.0.2 to 4.0.3 to fix this vulnerability

Source

Exploit-DB raw data:

Three weeks ago, I coded a nice little browser fuzzer, and started 
playing with various browsers: IE, Firefox, Safari, Chrome, Opera... 

I found an interesting Safari crash after couple of hours of fuzzing.
It was a stack overflow (and a smile on my face). Since then, every now
and then I took some time to play with it. 

Today, I noticed that Apple updated Safari 4.0.2 to 4.0.3.
Among some other vulnerabilities, this vulnerability has also been fixed. 
The Apple announcement is available at
http://lists.apple.com/archives/security-announce/2009/Aug/msg00002.html.

Depends on the perspective, but from my own - Very Bad Luck. C'est la vie, 
things like this happen... Some bugs die young.

This simple and interesting vulnerability is located in WebKit's 
JavaScript code that parses floating point numbers. It can be triggered 
with script like this:

---------
<script>
var Overflow = "31337" + 0.313373133731337313373133731337...;
</script>
---------

Or something like this...

---------
<img width=0.3133731337313373133731337... src="31337.jpg">
---------

Play little bit with numbers to get a desirable return address, little 
bit of heap spraying, and it works. 


Regards,
Leon Juranic

# milw0rm.com [2009-08-18]