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Vulnerability record · CVE-2011-3379 · published 3 November 2011

CVE-2011-3379: Php code injection vulnerability

Php · Php

The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders.

7.5 CVSS 2.0 High EPSS 5.0% · top 8.1% CWE-94 · Code injection
7.5CVSS 2.0 base score
5.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

The is_a function in PHP 5.3.7 and 5.3.8 triggers a call to the __autoload function, which makes it easier for remote attackers to execute arbitrary code by providing a crafted URL and leveraging potentially unsafe behavior in certain PEAR packages and custom autoloaders.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://securityreason.com/securityalert/8525
http://svn.php.net/viewvc/?view=revision&revision=317183 Patch
http://www.byte.nl/blog/2011/09/23/security-bug-in-is_a-function-in-php-5-3-7-5-3-8/ Exploit
http://www.securityfocus.com/archive/1/519770/30/0/threaded
https://bugs.php.net/bug.php?id=55475 Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=741020 Patch
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
http://securityreason.com/securityalert/8525
http://svn.php.net/viewvc/?view=revision&revision=317183 Patch
http://www.byte.nl/blog/2011/09/23/security-bug-in-is_a-function-in-php-5-3-7-5-3-8/ Exploit
http://www.securityfocus.com/archive/1/519770/30/0/threaded
https://bugs.php.net/bug.php?id=55475 Exploit
https://bugzilla.redhat.com/show_bug.cgi?id=741020 Patch

Track CVE-2011-3379 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-3379), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.