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Vulnerability record · CVE-2011-0420 · published 19 February 2011

CVE-2011-0420: Php vulnerability

Php · Php

The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to cause a denial of service (crash) via an invalid size argument, which triggers a NULL pointer dereference.

5.0 CVSS 2.0 Medium EPSS 14% · top 3.5%
5.0CVSS 2.0 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

The grapheme_extract function in the Internationalization extension (Intl) for ICU for PHP 5.3.5 allows context-dependent attackers to cause a denial of service (crash) via an invalid size argument, which triggers a NULL pointer dereference.

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

Affected products

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

References

LinkTags
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://securityreason.com/achievement_securityalert/94 Exploit
http://securityreason.com/securityalert/8087
http://support.apple.com/kb/HT5002
http://svn.php.net/viewvc/php/php-src/trunk/ext/intl/grapheme/grapheme_string.c?r1=306449&r2=306448&pathrev=306449 Patch
http://www.debian.org/security/2011/dsa-2266
http://www.exploit-db.com/exploits/16182
http://www.kb.cert.org/vuls/id/210829 US Government Resource
http://www.securityfocus.com/archive/1/516504/100/0/threaded
http://www.securityfocus.com/archive/1/516518/100/0/threaded
http://www.securityfocus.com/bid/46429 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/65437
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://securityreason.com/achievement_securityalert/94 Exploit
http://securityreason.com/securityalert/8087
http://support.apple.com/kb/HT5002
http://svn.php.net/viewvc/php/php-src/trunk/ext/intl/grapheme/grapheme_string.c?r1=306449&r2=306448&pathrev=306449 Patch
http://www.debian.org/security/2011/dsa-2266
http://www.exploit-db.com/exploits/16182
http://www.kb.cert.org/vuls/id/210829 US Government Resource
http://www.securityfocus.com/archive/1/516504/100/0/threaded
http://www.securityfocus.com/archive/1/516518/100/0/threaded
http://www.securityfocus.com/bid/46429 Exploit
https://exchange.xforce.ibmcloud.com/vulnerabilities/65437

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

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Source: NIST National Vulnerability Database (record CVE-2011-0420), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.