PHP 'zero-day' hole found

Powered by SC Magazine
 

Bugged patch fails to fix flaw.

A dangerous vulnerability has been discovered in PHP-CGI which grants attackers remote code execution and the ability to steal source code.

The hole was publicly disclosed reportedly in error to Reddit following a patch issued by PHP Group, but the fix was later discovered by researcher Steffan Esser to have failed.

Researchers from Dutch security firm De Eindbazen discovered the vulnerability during a capture-the-flag event at the Nullcon event last year.

 

 

A workaround fix on which the failed patches (PHP versions 5.3.12 and 5.4.2) were based was posted to De Eindbbazen's web site which included technical details on the flaw.

Researchers warned that users not follow “homebrew” fixes posted in online comments about the flaw.

The flaw affected classic CGI servers and was centred on a query string that issued a “-s” command argument pushed to PHP. It had existed since 2004, researchers said.

The research firm recommended users use a wrapper binary around the php-cgi binary until a permanent fix is released.

Copyright © SC Magazine, Australia


PHP 'zero-day' hole found
 
 
 
Top Stories
Time management tips for CIOs
[Blog post] How to get to the genba.
 
Making a case for collaboration
[Blog post] Tap into your company’s people power.
 
Five zero-cost ways to improve MySQL performance
How to easily boost MySQL throughput by up to 5x.
 
 
Sign up to receive iTnews email bulletins
   FOLLOW US...
Latest Comments
Polls
Which is the most prevalent cyber attack method your organisation faces?




   |   View results
Phishing and social engineering
  69%
 
Advanced persistent threats
  3%
 
Unpatched or unsupported software vulnerabilities
  10%
 
Denial of service attacks
  6%
 
Insider threats
  11%
TOTAL VOTES: 1109

Vote