What’s Vulnerable › Vulnerabilities

CVE-2011-0420

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 14.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2011-02-19 · updated 2026-06-16

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.

Affected products

• PHP: 5.3.5

References

• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
• http://securityreason.com/achievement_securityalert/94
• 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
• http://www.debian.org/security/2011/dsa-2266
• http://www.exploit-db.com/exploits/16182
• http://www.kb.cert.org/vuls/id/210829
• 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
• https://exchange.xforce.ibmcloud.com/vulnerabilities/65437

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