News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Stefan Esser's Blog:
Suhosin 0.9.20 and crypt() Thread Safety Vulnerability
May 22, 2007 @ 08:34:00

Stefan Esser points out the latest release of his PHP security enhancement patch, Suhosin 0.9.20, and some of the features it adds, a major one specifically.

The most important addition is that a mutex is placed around the call to the system's crypt() function to ensure thread safety. This mutex is necessary to close a bunch of possible attacks on the libc crypt() function on multi threaded systems.

He goes on to explain why it's so important - correcting a possible race condition between competing threads looking to use the crypt() function at the same time. They use the same shared memory space and, because of this, can return possible invalid data. The patch changes this behavior and replaces it with a blowfish implementation to make things more thread-safe.

1 comment voice your opinion now!
suhosin patch security crypt threadsafe vulnerability suhosin patch security crypt threadsafe vulnerability


blog comments powered by Disqus

Similar Posts

ThinkPHP Blog: Leveraging Security to PHP (using sausages)

Hardened-PHP Project: PHP HTML Entity Encoder Heap Overflow Vulnerability

Bill Staples' Blog: IIS7 Patch for Windows Vista fixes CGI/PHP apps - multiple response headers

Debuggable Blog: Finally - CakePHP 1.2 RC1 is out!

International PHP Magazine: Poll Question: What Do You Look for in Frameworks?


Community Events

Don't see your event here?
Let us know!


laravel library symfony2 opinion interview extension community podcast api performance conference php7 release series framework install introduction voicesoftheelephpant version example

All content copyright, 2015 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework