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 service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which…
Does this matter?
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.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 87.48% probability · 100th percentile
- Public exploits
- 4 in Exploit-DB · verified · first 17 May 2013
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- f5/nginx · fedoraproject/fedora
- Source
- secalert@redhat.com
EPSS 87.5% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (4)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
| EDB-ID | Title | Type | Published | Verified |
|---|---|---|---|---|
| EDB-32277source ↗ | Nginx 1.4.0 (Generic Linux x64) - Remote Overflowlinux_x86-64 · sorbo | remote | 15 March 2014 | no |
| EDB-26737source ↗ | Nginx 1.3.9/1.4.0 (x86) - Brute Forcelinux_x86 · kingcope | remote | 11 July 2013 | no |
| EDB-25775source ↗ | Nginx 1.3.9 < 1.4.0 - Chuncked Encoding Stack Buffer Overflow (Metasploit)linux · Metasploit | remote | 28 May 2013 | yes |
| EDB-25499source ↗ | Nginx 1.3.9 < 1.4.0 - Denial of Service (PoC)linux · Mert SARICA | dos | 17 May 2013 | no |
References
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.htmlThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.htmlMitigation, Patch, Vendor Advisory
- http://nginx.org/download/patch.2013.chunked.txtPatch, Vendor Advisory
- http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- http://secunia.com/advisories/55181Third Party Advisory
- http://security.gentoo.org/glsa/glsa-201310-04.xmlThird Party Advisory
- http://www.osvdb.org/93037Broken Link
- http://www.securityfocus.com/bid/59699Third Party Advisory, VDB Entry
- http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/Broken Link
- https://github.com/rapid7/metasploit-framework/pull/1834Patch, Third Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.htmlThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.htmlMitigation, Patch, Vendor Advisory
- http://nginx.org/download/patch.2013.chunked.txtPatch, Vendor Advisory
- http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- http://secunia.com/advisories/55181Third Party Advisory
- http://security.gentoo.org/glsa/glsa-201310-04.xmlThird Party Advisory
- http://www.osvdb.org/93037Broken Link
- http://www.securityfocus.com/bid/59699Third Party Advisory, VDB Entry
- http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/Broken Link
- https://github.com/rapid7/metasploit-framework/pull/1834Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.