Vulnerability identifier: #VU15744

Vulnerability risk: Medium

CVSSv3.1:

CVE-ID: CVE-2018-16844

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
nginx
Server applications / Web servers

Vendor: NGINX

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to excessive CPU usage when processing HTTP/2 requests within the ngx_http_v2_module module. A remote attacker can send specially crafted HTTP/2 requests to the affected web server and cause high CPU usage and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

nginx: 1.15.0 - 1.15.5, 1.14.0, 1.13.0 - 1.13.12, 1.12.0 - 1.12.1, 1.11.0 - 1.11.13, 1.10.0 - 1.10.3, 1.9.5 - 1.9.15

---

CPE

• cpe:2.3:a:nginx:nginx:1.15.5:*:*:*:*:*:*:*

External links
http://mailman.nginx.org/pipermail/nginx-announce/2018/000220.html?_ga=2.143807029.1839563140.154152...

---

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?