{
    "id": "CVE-2013-2028",
    "published": "2013-07-20 03:37:20",
    "last_modified": "2026-06-16 23:52:36",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "2.0",
    "cvss_vector": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
    "cwe": "CWE-787",
    "description": "The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.",
    "epss_score": "0.87475",
    "epss_percentile": "0.99753",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:18:53",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "f5",
            "product": "nginx"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "32277",
            "title": "Nginx 1.4.0 (Generic Linux x64) - Remote Overflow",
            "date": "2014-03-15",
            "url": "https://www.exploit-db.com/exploits/32277"
        },
        {
            "source": "exploit-db",
            "ref_id": "26737",
            "title": "Nginx 1.3.9/1.4.0 (x86) - Brute Force",
            "date": "2013-07-11",
            "url": "https://www.exploit-db.com/exploits/26737"
        },
        {
            "source": "exploit-db",
            "ref_id": "25775",
            "title": "Nginx 1.3.9 < 1.4.0 - Chuncked Encoding Stack Buffer Overflow (Metasploit)",
            "date": "2013-05-28",
            "url": "https://www.exploit-db.com/exploits/25775"
        },
        {
            "source": "exploit-db",
            "ref_id": "25499",
            "title": "Nginx 1.3.9 < 1.4.0 - Denial of Service (PoC)",
            "date": "2013-05-17",
            "url": "https://www.exploit-db.com/exploits/25499"
        }
    ],
    "refs_list": [
        "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html",
        "http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html",
        "http://nginx.org/download/patch.2013.chunked.txt",
        "http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html",
        "http://secunia.com/advisories/55181",
        "http://security.gentoo.org/glsa/glsa-201310-04.xml",
        "http://www.osvdb.org/93037",
        "http://www.securityfocus.com/bid/59699",
        "http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/",
        "https://github.com/rapid7/metasploit-framework/pull/1834",
        "http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html",
        "http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html",
        "http://nginx.org/download/patch.2013.chunked.txt",
        "http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html",
        "http://secunia.com/advisories/55181",
        "http://security.gentoo.org/glsa/glsa-201310-04.xml",
        "http://www.osvdb.org/93037",
        "http://www.securityfocus.com/bid/59699",
        "http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/",
        "https://github.com/rapid7/metasploit-framework/pull/1834"
    ]
}