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Fencer Vulns
high 7.5

CVE-2009-3291 json

The php_openssl_apply_verification_policy function in PHP before 5.2.11 does not properly perform certificate validation, which has unknown…

published 2009-09-22 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3273

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

The php_openssl_apply_verification_policy function in PHP before 5.2.11 does not properly perform certificate validation, which has unknown impact and attack vectors, probably related to an ability to spoof certificates.

Patch / fix

  • php RHEL 3 4.3.2-54.ent
  • php RHEL 4 4.3.9-3.29
  • php RHEL 5 5.1.6-24.el5_4.5
  • php-gd RHEL 4 4.3.9-3.29
  • php-gd RHEL 5 5.1.6-24.el5_4.5
  • php-cli RHEL 5 5.1.6-24.el5_4.5
  • php-dba RHEL 5 5.1.6-24.el5_4.5
  • php-pdo RHEL 5 5.1.6-24.el5_4.5

red hat advisories RHSA-2010:0040

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-2009-3291 updated cvss 2.6

php: openssl extension: Incorrect verification of SSL certificate with NUL in name

  • Red Hat Desktop version 3 php 4.3.2-54.ent, php-imap 4.3.2-54.ent, php-ldap 4.3.2-54.ent, php-odbc 4.3.2-54.ent, php-mysql 4.3.2-54.ent, php-pgsql 4.3.2-54.ent Red Hat Enterprise Linux (v. 5 server) php 5.1.6-24.el5_4.5, php-gd 5.1.6-24.el5_4.5, php-cli 5.1.6-24.el5_4.5, php-dba 5.1.6-24.el5_4.5, php-pdo 5.1.6-24.el5_4.5, php-xml 5.1.6-24.el5_4.5, +12 more Red Hat Enterprise Linux AS version 3 php 4.3.2-54.ent, php-imap 4.3.2-54.ent, php-ldap 4.3.2-54.ent, php-odbc 4.3.2-54.ent, php-mysql 4.3.2-54.ent, php-pgsql 4.3.2-54.ent Red Hat Enterprise Linux AS version 4 php 4.3.9-3.29, php-gd 4.3.9-3.29, php-imap 4.3.9-3.29, php-ldap 4.3.9-3.29, php-odbc 4.3.9-3.29, php-pear 4.3.9-3.29, +7 more Red Hat Enterprise Linux Desktop version 4 php 4.3.9-3.29, php-gd 4.3.9-3.29, php-imap 4.3.9-3.29, php-ldap 4.3.9-3.29, php-odbc 4.3.9-3.29, php-pear 4.3.9-3.29, +7 more Red Hat Enterprise Linux Desktop Workstation (v. 5 client) php 5.1.6-24.el5_4.5, php-gd 5.1.6-24.el5_4.5, php-cli 5.1.6-24.el5_4.5, php-dba 5.1.6-24.el5_4.5, php-pdo 5.1.6-24.el5_4.5, php-xml 5.1.6-24.el5_4.5, +12 more
    +4 more products
    Red Hat Enterprise Linux ES version 3 php 4.3.2-54.ent, php-imap 4.3.2-54.ent, php-ldap 4.3.2-54.ent, php-odbc 4.3.2-54.ent, php-mysql 4.3.2-54.ent, php-pgsql 4.3.2-54.ent Red Hat Enterprise Linux ES version 4 php 4.3.9-3.29, php-gd 4.3.9-3.29, php-imap 4.3.9-3.29, php-ldap 4.3.9-3.29, php-odbc 4.3.9-3.29, php-pear 4.3.9-3.29, +7 more Red Hat Enterprise Linux WS version 3 php 4.3.2-54.ent, php-imap 4.3.2-54.ent, php-ldap 4.3.2-54.ent, php-odbc 4.3.2-54.ent, php-mysql 4.3.2-54.ent, php-pgsql 4.3.2-54.ent Red Hat Enterprise Linux WS version 4 php 4.3.9-3.29, php-gd 4.3.9-3.29, php-imap 4.3.9-3.29, php-ldap 4.3.9-3.29, php-odbc 4.3.9-3.29, php-pear 4.3.9-3.29, +7 more
    fixed: vendor fix RHSA-2010:0040

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

Exploit prediction

2.91% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation
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.