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Last updated: 5/31/2016 9:38:36 AM

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Vulnerability Summary for CVE-2011-0420

Original release date: 02/18/2011
Last revised: 09/07/2013


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.


Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'


CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.0 MEDIUM
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

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External Source: SREASON
Name: 8087
External Source: XF
Name: php-graphemeextract-dos(65437)
External Source: BUGTRAQ
Name: 20110217 Re: PHP 5.3.5 grapheme_extract() NULL Pointer Dereference
External Source: CONFIRM
Name: http://support.apple.com/kb/HT5002
External Source: MISC
Name: http://svn.php.net/viewvc/php/php-src/trunk/ext/intl/grapheme/grapheme_string.c?r1=306449&r2=306448&pathrev=306449
Type: Patch Information
External Source: DEBIAN
Name: DSA-2266
External Source: BID
Name: 46429
External Source: APPLE
Name: APPLE-SA-2011-10-12-3
US-CERT Vulnerability Note: CERT-VN
Name: VU#210829
External Source: BUGTRAQ
Name: 20110216 PHP 5.3.5 grapheme_extract() NULL Pointer Dereference
External Source: SREASONRES
Name: 20110217 PHP 5.3.5 grapheme_extract() NULL Pointer Dereference
External Source: EXPLOIT-DB
Name: 16182

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