CVE-2009-3557

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-11-23 · updated 2026-06-16
Weakness: CWE-264

Description

The tempnam function in ext/standard/file.c in PHP before 5.2.12 and 5.3.x before 5.3.1 allows context-dependent attackers to bypass safe_mode restrictions, and create files in group-writable or world-writable directories, via the dir and prefix arguments.

Affected products

PHP: through 5.2.11; 1.0, 2.0, 2.0b10, 3.0, 3.0.1, 3.0.2 (+56)

References

http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
http://marc.info/?l=bugtraq&m=127680701405735&w=2
http://news.php.net/php.announce/79
http://secunia.com/advisories/37412
http://secunia.com/advisories/37821
http://secunia.com/advisories/40262
http://securityreason.com/securityalert/6601
http://support.apple.com/kb/HT4077
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_2/ext/standard/file.c?view=log
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/standard/file.c?view=log
http://svn.php.net/viewvc?view=revision&revision=288945
http://www.mandriva.com/security/advisories?name=MDVSA-2009:285

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