The fopen function in PHP 5.2.0 does not properly handle invalid URI handlers, which allows context-dependent attackers to bypass safe_mode restrictions and read arbitrary files via a file path specified with an invalid URI, as demonstrated via the srpath URI.
CVSS Severity (version 2.0):
Impact Subscore: 10.0
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service
Official Statement from Red Hat (05/29/2007)
We do not consider these to be security issues. For more details see http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169857#c1
Official Statement from Mandriva (09/21/2007)
Due to the nature of safe_mode and open_basedir restrictions, and in alignment with the PHP group’s stance on these features, Mandriva does not consider this a security issue.
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20070125 PHP 5.2.0 safe_mode bypass (by Writing Mode)
Vulnerable software and versions