Summary
generated automatically from NVD dataIn nginx versions 1.3.9 through 1.4.0, the ngx_http_parse_chunked function in http/ngx_http_parse.c mishandles chunked Transfer-Encoding requests that specify a very large chunk size. This triggers an integer signedness error and a stack-based buffer overflow (CWE-787). A remote attacker could crash the server or potentially execute arbitrary code. The flaw also lists Fedora 19 as affected and carries a CVSS v2.0 score of 7.5 (HIGH).
NVD 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 · FIRST.org
87.5%probability of exploitation in the next 30 days
Higher than 99% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-11-02, recomputed daily by FIRST.org.
CVSS v2.0 Score
Information
- Published
- 20 juil. 2013
- Updated
- 16 juin 2026
- Status
- Modified
- Source
- secalert@redhat.com
Affected products
Bounds published by NVD: "< 8.4.27" means 8.4.27 is no longer vulnerable. The fixed release to install is in the vendor advisory.
Weaknesses (CWE)
References (20)
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.htmlThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.htmlMitigationPatchVendor Advisory
- http://nginx.org/download/patch.2013.chunked.txtPatchVendor Advisory
- http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.htmlExploitThird Party AdvisoryVDB 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 AdvisoryVDB Entry
- https://github.com/rapid7/metasploit-framework/pull/1834PatchThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.htmlThird Party Advisory
- http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.htmlMitigationPatchVendor Advisory
- http://nginx.org/download/patch.2013.chunked.txtPatchVendor Advisory
- http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.htmlExploitThird Party AdvisoryVDB Entry
- http://secunia.com/advisories/55181Third Party Advisory
- + 5 more references on NVD
Similar CVEs
Other vulnerabilities of type CWE-787
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