Race condition in the symlink function in PHP 5.1.6 and...
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- http://lists.grok.org.uk/pipermail/full-disclosure/2006-October/049850.html
- http://www.securityfocus.com/archive/1/448953/100/0/threaded
- http://www.securityfocus.com/archive/1/447649/100/0/threaded
- http://www.turbolinux.com/security/2006/TLSA-2006-38.txt
- http://www.securityfocus.com/bid/20326
- http://securityreason.com/securityalert/1692
- http://www.neosecurityteam.net/index.php?action=advisories&id=26
- http://secunia.com/advisories/22235
- http://www.securityfocus.com/archive/1/448020/100/0/threaded
- http://www.vupen.com/english/advisories/2006/3901
- https://exchange.xforce.ibmcloud.com/vulnerabilities/29340
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:185
- http://www.hardened-php.net/advisory_082006.132.html
- http://securitytracker.com/id?1016977
- http://secunia.com/advisories/22424
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Weaknesses (CWE)
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MITRE ATT&CK TTPs
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