CVE-2009-3558: n/a vulnerability

CVE-2009-3558: 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-d...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 06:31 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2009-3558 affects old PHP 5 releases. A PHP function could bypass open_basedir directory restrictions and create FIFO files outside intended limits. This matters mainly for legacy PHP servers, especially shared-hosting or multi-tenant systems that used open_basedir as a containment boundary. Exposure is likely limited to obsolete PHP 5.2.x before 5.2.12 or PHP 5.3.0 systems with the POSIX extension available. Risk is higher where untrusted users can run PHP code and open_basedir is relied on for isolation. Treat as a legacy-risk cleanup item unless you still operate PHP 5 multi-tenant systems. If open_basedir is part of your isolation model, prioritize remediation because the control can be bypassed in affected versions. Mitigation focus: Upgrade affected PHP to 5.2.12, 5.3.1, or preferably a supported PHP release.; Prioritize legacy shared-hosting and multi-tenant PHP environments.; Review PHP, OS vendor, and distribution advisories for supported package fixes..

Prepared: Jun 28, 2026, 15:21 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2009-3558 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup

Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Nov 23, 2009, 17:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.