CVE-2013-2028
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…
- 7.5HighCVSS base score
- 87.5%Exploitation in 30 daysEPSS · top 0.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 5Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and 4 Exploit-DB entries for it.
Show the exploits5
Metasploit modules1 module
- Nginx HTTP Server 1.3.9-1.4.0 Chunked Encoding Stack Buffer Overflow (Metasploit module) (opens in a new tab)
exploit/linux/http/nginx_chunked_sizeRank greatdisclosed 7 May 2013
Exploit-DB4 entries
- Nginx 1.4.0 (Generic Linux x64) - Remote Overflow (Exploit-DB entry) (opens in a new tab)
EDB-ID 32277remote, linux_x86-64published 15 Mar 2014Not verified
- Nginx 1.3.9/1.4.0 (x86) - Brute Force (Exploit-DB entry) (opens in a new tab)
EDB-ID 26737remote, linux_x86published 11 Jul 2013Not verified
- Nginx 1.3.9 < 1.4.0 - Chuncked Encoding Stack Buffer Overflow (Metasploit) (Exploit-DB entry) (opens in a new tab)
EDB-ID 25775remote, linuxpublished 28 May 2013Verified
- Nginx 1.3.9 < 1.4.0 - Denial of Service (PoC) (Exploit-DB entry) (opens in a new tab)
EDB-ID 25499dos, linuxpublished 17 May 2013Not verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By redhat
- 5 months later
· 5 months later
Published
- 11 years later
· 11 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 87.5% · top 0.2% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References10
- [nginx-announce] 20130507 nginx security advisory (CVE-2013-2028) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 93037 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- FEDORA-2013-7560 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/ (opens in a new tab)x_refsource_MISCx_transferred
- 55181 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 59699 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- GLSA-201310-04 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://github.com/rapid7/metasploit-framework/pull/1834 (opens in a new tab)x_refsource_MISCx_transferred
- http://nginx.org/download/patch.2013.chunked.txt (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2013-2015 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2013-2028)Record last updated .