{"id":"CVE-2013-2028","url":"https://www.cyber-defence.io/tools/cve/CVE-2013-2028","generatedAt":"2026-10-27T18:48:04.398Z","title":"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…","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.","published":"2013-07-20T03:37:21.000Z","lastModified":"2026-06-16T23:52:37.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":7.5,"severity":"HIGH","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P"},"cwe":["CWE-787"],"affected":["f5/nginx","fedoraproject/fedora"],"epss":{"score":0.87475,"percentile":0.99754,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":4,"verified":true,"firstPublished":"2013-05-17","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":32277,"kind":"exploit","title":"Nginx 1.4.0 (Generic Linux x64) - Remote Overflow","url":"https://www.exploit-db.com/exploits/32277","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux_x86-64/remote/32277.txt","file":"exploits/linux_x86-64/remote/32277.txt","published":"2014-03-15","added":"2014-03-20","updated":"2017-11-22","author":"sorbo","type":"remote","platform":"linux_x86-64","port":null,"verified":false,"codes":["CVE-2013-2028"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comnginx-1.4.0.tar.gz","screenshotUrl":null,"referenceUrl":null},{"edbId":26737,"kind":"exploit","title":"Nginx 1.3.9/1.4.0 (x86) - Brute Force","url":"https://www.exploit-db.com/exploits/26737","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux_x86/remote/26737.pl","file":"exploits/linux_x86/remote/26737.pl","published":"2013-07-11","added":"2013-07-11","updated":"2013-07-11","author":"kingcope","type":"remote","platform":"linux_x86","port":null,"verified":false,"codes":["CVE-2013-2028","OSVDB-93037"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comnginx-1.4.0.tar.gz","screenshotUrl":null,"referenceUrl":null},{"edbId":25775,"kind":"exploit","title":"Nginx 1.3.9 < 1.4.0 - Chuncked Encoding Stack Buffer Overflow (Metasploit)","url":"https://www.exploit-db.com/exploits/25775","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/remote/25775.rb","file":"exploits/linux/remote/25775.rb","published":"2013-05-28","added":"2013-05-28","updated":"2016-09-26","author":"Metasploit","type":"remote","platform":"linux","port":80,"verified":true,"codes":["CVE-2013-2028","OSVDB-93037"],"tags":"Metasploit Framework (MSF)","aliases":null,"applicationUrl":"http://www.exploit-db.comnginx-1.4.0.tar.gz","screenshotUrl":null,"referenceUrl":null},{"edbId":25499,"kind":"exploit","title":"Nginx 1.3.9 < 1.4.0 - Denial of Service (PoC)","url":"https://www.exploit-db.com/exploits/25499","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/25499.py","file":"exploits/linux/dos/25499.py","published":"2013-05-17","added":"2013-05-17","updated":"2013-05-17","author":"Mert SARICA","type":"dos","platform":"linux","port":null,"verified":false,"codes":["CVE-2013-2028","OSVDB-93037"],"tags":null,"aliases":null,"applicationUrl":"http://www.exploit-db.comnginx-1.4.0.tar.gz","screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 87.5%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html","tags":["Mitigation","Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://nginx.org/download/patch.2013.chunked.txt","tags":["Patch","Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/55181","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://security.gentoo.org/glsa/glsa-201310-04.xml","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.osvdb.org/93037","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/59699","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/","tags":["Broken Link"],"source":"secalert@redhat.com"},{"url":"https://github.com/rapid7/metasploit-framework/pull/1834","tags":["Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html","tags":["Mitigation","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://nginx.org/download/patch.2013.chunked.txt","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/55181","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://security.gentoo.org/glsa/glsa-201310-04.xml","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.osvdb.org/93037","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/59699","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/rapid7/metasploit-framework/pull/1834","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2013-2028","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}