{
    "id": "CVE-2011-0421",
    "published": "2011-03-20 02:00:03",
    "last_modified": "2026-06-16 23:27:19",
    "cvss_score": "4.3",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
    "cwe": null,
    "description": "The _zip_name_locate function in zip_name_locate.c in the Zip extension in PHP before 5.3.6 does not properly handle a ZIPARCHIVE::FL_UNCHANGED argument, which might allow context-dependent attackers to cause a denial of service (NULL pointer dereference) via an empty ZIP archive that is processed with a (1) locateName or (2) statName operation.",
    "epss_score": "0.13514",
    "epss_percentile": "0.96321",
    "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": "17004",
            "title": "PHP 5.3.5 libzip 0.9.3 - _zip_name_locate Null Pointer Dereference",
            "date": "2011-03-18",
            "url": "https://www.exploit-db.com/exploits/17004"
        }
    ],
    "refs_list": [
        "http://bugs.php.net/bug.php?id=53885",
        "http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057709.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057710.html",
        "http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056642.html",
        "http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html",
        "http://marc.info/?l=bugtraq&m=133469208622507&w=2",
        "http://secunia.com/advisories/43621",
        "http://securityreason.com/achievement_securityalert/96",
        "http://securityreason.com/securityalert/8146",
        "http://support.apple.com/kb/HT5002",
        "http://svn.php.net/viewvc/?view=revision&revision=307867",
        "http://www.debian.org/security/2011/dsa-2266",
        "http://www.exploit-db.com/exploits/17004",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2011:052",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2011:053",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2011:099",
        "http://www.php.net/ChangeLog-5.php",
        "http://www.php.net/archive/2011.php",
        "http://www.php.net/releases/5_3_6.php",
        "http://www.securityfocus.com/archive/1/517065/100/0/threaded",
        "http://www.securityfocus.com/bid/46354",
        "http://www.vupen.com/english/advisories/2011/0744",
        "http://www.vupen.com/english/advisories/2011/0764",
        "http://www.vupen.com/english/advisories/2011/0890"
    ]
}