CVE-2009-3558
MEDIUM · CVSS 6.8EPSS 2.1%EU EUVD
The posix_mkfifo function in ext/posix/posix.c in PHP before 5.2.12 and 5.3.x before 5.3.1 allows context-dependent attackers to bypass open_basedir restrictions, and create FIFO files, via the pathname and mode arguments, as demonstrated by creating a .htaccess file.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-264
- EPSS score
- 2.1% (82th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-3539)
- Published
- November 23, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-3539 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
and 12 more…
References
- http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
- http://news.php.net/php.announce/79
- http://secunia.com/advisories/37412(Vendor Advisory)
- http://secunia.com/advisories/37821
- http://securityreason.com/securityalert/6600(Exploit)
- http://support.apple.com/kb/HT4077
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_2/ext/posix/posix.c?view=log
- http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/ext/posix/posix.c?view=log
- http://svn.php.net/viewvc?view=revision&revision=288943(Patch)
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:285
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:302
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:303
- http://www.openwall.com/lists/oss-security/2009/11/20/2(Patch)
- http://www.openwall.com/lists/oss-security/2009/11/20/3(Patch)
- http://www.openwall.com/lists/oss-security/2009/11/20/5(Patch)
- http://www.php.net/ChangeLog-5.php
- http://www.php.net/releases/5_2_12.php
- http://www.php.net/releases/5_3_1.php
- http://www.vupen.com/english/advisories/2009/3593
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain