Buffer over-read in nginx - CVE-2018-16845

Detailed vulnerability description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or trigger denial of service conditions.

The vulnerability exists due to a boundary condition when processing headers of MP4 files within the ngx_http_mp4_module module. A remote attacker can create a specially crafted MP4 file, trick the victim into uploading it on the server and trigger application crash or disclosure of the worker's process memory.

Successful exploitation of the vulnerability requires that nginx is compiled with support for ngx_http_mp4_module module (not a default configuration).

How to mitigate CVE-2018-16845

Sources

• http://mailman.nginx.org/pipermail/nginx-announce/2018/000221.html