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Fencer Vulns
low 2.1

CVE-2009-0754 json

PHP 4.4.4, 5.1.6, and other versions, when running on Apache, allows local users to modify behavior of other sites hosted on the same web s…

published 2009-03-03 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-0754

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
1
Exploit-DB

Summary

PHP 4.4.4, 5.1.6, and other versions, when running on Apache, allows local users to modify behavior of other sites hosted on the same web server by modifying the mbstring.func_overload setting within .htaccess, which causes this setting to be applied to other virtual hosts on the same server.

Patch / fix

  • php RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-gd RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-cli RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-dba RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-pdo RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-xml RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-imap RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2
  • php-ldap RHEL 2 APPLICATION_STACK 5.2.6-4.el5s2

red hat advisories RHSA-2009:0350RHSA-2009:0338RHSA-2009:0337

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-0754 updated cvss 2.1

PHP mbstring.func_overload web server denial of service

  • Red Hat Desktop version 3 php 4.3.2-51.ent, php-imap 4.3.2-51.ent, php-ldap 4.3.2-51.ent, php-odbc 4.3.2-51.ent, php-mysql 4.3.2-51.ent, php-pgsql 4.3.2-51.ent
    fixed: vendor fix RHSA-2009:0337
  • Red Hat Enterprise Linux (v. 5 server) php 5.1.6-23.2.el5_3, php-gd 5.1.6-23.2.el5_3, php-cli 5.1.6-23.2.el5_3, php-dba 5.1.6-23.2.el5_3, php-pdo 5.1.6-23.2.el5_3, php-xml 5.1.6-23.2.el5_3, +12 more
    fixed: vendor fix RHSA-2009:0338
  • Red Hat Enterprise Linux AS version 3 php 4.3.2-51.ent, php-imap 4.3.2-51.ent, php-ldap 4.3.2-51.ent, php-odbc 4.3.2-51.ent, php-mysql 4.3.2-51.ent, php-pgsql 4.3.2-51.ent Red Hat Enterprise Linux AS version 4 php 4.3.9-3.22.15, php-gd 4.3.9-3.22.15, php-imap 4.3.9-3.22.15, php-ldap 4.3.9-3.22.15, php-odbc 4.3.9-3.22.15, php-pear 4.3.9-3.22.15, +7 more Red Hat Enterprise Linux Desktop version 4 php 4.3.9-3.22.15, php-gd 4.3.9-3.22.15, php-imap 4.3.9-3.22.15, php-ldap 4.3.9-3.22.15, php-odbc 4.3.9-3.22.15, php-pear 4.3.9-3.22.15, +7 more
    fixed: vendor fix RHSA-2009:0337
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) php 5.1.6-23.2.el5_3, php-gd 5.1.6-23.2.el5_3, php-cli 5.1.6-23.2.el5_3, php-dba 5.1.6-23.2.el5_3, php-pdo 5.1.6-23.2.el5_3, php-xml 5.1.6-23.2.el5_3, +12 more
    fixed: vendor fix RHSA-2009:0338
  • Red Hat Enterprise Linux ES version 3 php 4.3.2-51.ent, php-imap 4.3.2-51.ent, php-ldap 4.3.2-51.ent, php-odbc 4.3.2-51.ent, php-mysql 4.3.2-51.ent, php-pgsql 4.3.2-51.ent Red Hat Enterprise Linux ES version 4 php 4.3.9-3.22.15, php-gd 4.3.9-3.22.15, php-imap 4.3.9-3.22.15, php-ldap 4.3.9-3.22.15, php-odbc 4.3.9-3.22.15, php-pear 4.3.9-3.22.15, +7 more Red Hat Enterprise Linux WS version 3 php 4.3.2-51.ent, php-imap 4.3.2-51.ent, php-ldap 4.3.2-51.ent, php-odbc 4.3.2-51.ent, php-mysql 4.3.2-51.ent, php-pgsql 4.3.2-51.ent Red Hat Enterprise Linux WS version 4 php 4.3.9-3.22.15, php-gd 4.3.9-3.22.15, php-imap 4.3.9-3.22.15, php-ldap 4.3.9-3.22.15, php-odbc 4.3.9-3.22.15, php-pear 4.3.9-3.22.15, +7 more
    fixed: vendor fix RHSA-2009:0337

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-32769)
  2. Published

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-32769 PHP 5.2.5 - 'mbstring.func_overload' WebServer Denial of Service dos, 2009-01-30
  • bugs.php.net http://bugs.php.net/bug.php?id=27421 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-134 Use of Externally-Controlled Format String
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.