Nginx stack-based buffer overflow

Description

Greg MacManus, of iSIGHT Partners Labs, found a security problem in several recent versions of nginx. A stack-based buffer overflow might occur in a worker process while handling a specially crafted request, potentially resulting in arbitrary code execution (CVE-2013-2028).

The problem affects nginx 1.3.9 - 1.4.0.
The problem is fixed in nginx 1.5.0, 1.4.1.

Remediation

Patch for the problem can be found here:
http://nginx.org/download/patch.2013.chunked.txt

As a temporary workaround the following configuration can be used in each server{} block:

    if ($http_transfer_encoding ~* chunked) {
        return 444;
    }

References
Severity
Classification
Tags
  • Known Vulnerabilities  Missing Update