{
    "id": "CVE-2011-3607",
    "published": "2011-11-08 11:55:05",
    "last_modified": "2026-06-16 23:33:35",
    "cvss_score": "4.4",
    "cvss_severity": "MEDIUM",
    "cvss_version": "2.0",
    "cvss_vector": "AV:L/AC:M/Au:N/C:P/I:P/A:P",
    "cwe": "CWE-189",
    "description": "Integer overflow in the ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, allows local users to gain privileges via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, leading to a heap-based buffer overflow.",
    "epss_score": "0.04719",
    "epss_percentile": "0.91562",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-03 18:17:10",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "apache",
            "product": "http_server"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "41769",
            "title": "Apache < 2.0.64 / < 2.2.21 mod_setenvif - Integer Overflow",
            "date": "2011-11-02",
            "url": "https://www.exploit-db.com/exploits/41769"
        }
    ],
    "refs_list": [
        "http://archives.neohapsis.com/archives/fulldisclosure/2011-11/0023.html",
        "http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041",
        "http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html",
        "http://marc.info/?l=bugtraq&m=133294460209056&w=2",
        "http://marc.info/?l=bugtraq&m=133494237717847&w=2",
        "http://marc.info/?l=bugtraq&m=134987041210674&w=2",
        "http://rhn.redhat.com/errata/RHSA-2012-0128.html",
        "http://rhn.redhat.com/errata/RHSA-2012-0542.html",
        "http://rhn.redhat.com/errata/RHSA-2012-0543.html",
        "http://secunia.com/advisories/45793",
        "http://secunia.com/advisories/48551",
        "http://securitytracker.com/id?1026267",
        "http://support.apple.com/kb/HT5501",
        "http://www.debian.org/security/2012/dsa-2405",
        "http://www.fujitsu.com/global/support/software/security/products-f/interstage-201303e.html",
        "http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/",
        "http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2012:003",
        "http://www.mandriva.com/security/advisories?name=MDVSA-2013:150",
        "http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html",
        "http://www.oracle.com/technetwork/topics/security/cpujul2012-392727.html",
        "http://www.osvdb.org/76744",
        "http://www.securityfocus.com/bid/50494",
        "https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/811422",
        "https://bugzilla.redhat.com/show_bug.cgi?id=750935"
    ]
}