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Category:   Application (Generic)  >   PHP Vendors:   PHP Group
(Oracle Issues Fix for Solaris) PHP OpenSSL subjectAltName Null Byte Processing Flaw Lets Remote Users Spoof SSL Servers
SecurityTracker Alert ID:  1030293
SecurityTracker URL:  http://securitytracker.com/id/1030293
CVE Reference:   CVE-2013-4248   (Links to External Site)
Date:  May 27 2014
Impact:   Modification of authentication information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 5.4.18 and 5.5.2
Description:   A vulnerability was reported in PHP. A remote user can conduct certificate spoofing attacks.

The PHP OpenSSL module does not properly handle '\0' characters in a domain name in the Subject Alternative Name field. A remote user that can create a specially crafted certificate signed by a valid Certificate Authority can spoof arbitrary SSL servers.

The openssl_x509_parse() function in 'openssl.c' is affected.

Impact:   A remote user can conduct certificate spoofing attacks.
Solution:   Oracle has issued a fix for Solaris.

The Oracle advisory is available at:

https://blogs.oracle.com/sunsecurity/entry/cve_2013_4248_input_validation

Vendor URL:  www.php.net/ChangeLog-5.php#5.5.2 (Links to External Site)
Cause:   Authentication error
Underlying OS:  UNIX (Solaris - SunOS)
Underlying OS Comments:  11.1

Message History:   This archive entry is a follow-up to the message listed below.
Aug 19 2013 PHP OpenSSL subjectAltName Null Byte Processing Flaw Lets Remote Users Spoof SSL Servers



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