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Tool Directory

CVE-2007-1835

MediumPublished

PHP 4 before 4.4.5 and PHP 5 before 5.2.1, when using an empty session save path (session.save_path), uses the TMPDIR default after checking the...

Published: Apr 3, 2007
Updated: Aug 7, 2024
Assigning CNA: mitre
Evidence observed: Mar 28, 2007

Primary CVSS

4.6/ 10Medium

nvd · CVSS 2.0

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

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 50.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

PHP 4 before 4.4.5 and PHP 5 before 5.2.1, when using an empty session save path (session.save_path), uses the TMPDIR default after checking the restrictions, which allows local users to bypass open_basedir restrictions.

Sources

PHP 5.2.1 - 'Session.Save_Path()' TMPDIR open_basedir Restriction BypassExploit
Stefan Esser · php · Mar 28, 2007

Responsible use

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