PHP software contains a vulnerability that could allow an unauthenticated, remote attacker to view sensitive system information on a targeted system.
The vulnerability exists because the linkinfo() function, as defined in the ext/standard/link_win32.c source code file of the affected software, does not properly implement open_basedir checking mechanisms. An attacker could exploit this vulnerability to view files outside of the allowed directories.
PHP has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker must send a request that
submits malicious input to the targeted system, making exploitation more
difficult in environments that restrict network access from untrusted
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.