{
    "id": "CVE-2011-0420",
    "published": "2011-02-19 01:00:02",
    "last_modified": "2026-06-16 23:27:19",
    "cvss_score": "5.0",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
    "cwe": null,
    "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.",
    "epss_score": "0.14409",
    "epss_percentile": "0.96507",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-27 18:17:10",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "php",
            "product": "php"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "16182",
            "title": "PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference",
            "date": "2011-02-17",
            "url": "https://www.exploit-db.com/exploits/16182"
        },
        {
            "source": "exploit-db",
            "ref_id": "35354",
            "title": "PHP 5.3.5 - 'grapheme_extract()' Null Pointer Dereference Denial of Service",
            "date": "2011-02-17",
            "url": "https://www.exploit-db.com/exploits/35354"
        }
    ],
    "refs_list": [
        "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",
        "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"
    ]
}