Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the open_basedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the open_basedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.
Advisories
Source ID Title
EUVD EUVD EUVD-2006-5163 Race condition in the symlink function in PHP 5.1.6 and earlier allows local users to bypass the open_basedir restriction by using a combination of symlink, mkdir, and unlink functions to change the file path after the open_basedir check and before the file is opened by the underlying system, as demonstrated by symlinking a symlink into a subdirectory, to point to a parent directory via .. (dot dot) sequences, and then unlinking the resulting symlink.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-07T19:41:04.388Z

Reserved: 2006-10-05T00:00:00

Link: CVE-2006-5178

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2006-10-10T04:06:00.000

Modified: 2025-04-09T00:30:58.490

Link: CVE-2006-5178

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.