CVE-2013-2028: F5 Nginx

High severity, CVSS 7.5. EPSS: 87.5% chance of exploitation in the next 30 days.

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.

Affected products

• F5 Nginx: from 1.3.9, up to and including 1.4.0
• Fedoraproject Fedora: version 19 only

Published 2013-07-20. Last modified 2026-06-16.