CVE-2011-0752
Description
From CVE.org
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.
Statement
We do not consider this flaw to be a security issue as it is only exploitable by the script author. No trust boundary is crossed.
This issue did not affect the versions of PHP as shipped with Red Hat Enterprise Linux 3, 4, or 5 (php). This issue was addressed in the php53 packages as shipped in Red Hat Enterprise Linux 5 before their first release in Red Hat Enterprise Linux 5.6, and it was addressed in the php package in Red Hat Enterprise Linux 6 via RHBA-2011:0615.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 2.6 | 5 | N/A |
| Attack Vector | Network | Network | N/A |
| Access Complexity | High | Low | N/A |
| Authentication | None | None | N/A |
| Confidentiality Impact | None | None | N/A |
| Integrity Impact | Partial | Partial | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: AV:N/AC:H/Au:N/C:N/I:P/A:N
NVD: AV:N/AC:L/Au:N/C:N/I:P/A:N
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