Vulnerability: Unrestricted Overwriting of GLOBALS and this Variable in PHP's extract Function

Vulnerability: Unrestricted Overwriting of GLOBALS and this Variable in PHP's extract Function

CVE-2011-0752 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

The extract function in PHP before 5.2.15 does not prevent use of the EXTR_OVERWRITE parameter to overwrite (1) the GLOBALS superglobal array and (2) the this variable, which allows context-dependent attackers to bypass intended access restrictions by modifying data structures that were not intended to depend on external input, a related issue to CVE-2005-2691 and CVE-2006-3758.

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