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Category:   Application (Web Server/CGI)  >   nginx Vendors:   nginx.org
(Ubuntu Issues Fix) nginx HTTP/2 Processing Bugs Lets Remote Users Deny Service
SecurityTracker Alert ID:  1042040
SecurityTracker URL:  http://securitytracker.com/id/1042040
CVE Reference:   CVE-2018-16843, CVE-2018-16844   (Links to External Site)
Date:  Nov 7 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.9.5 - 1.15.5
Description:   Two vulnerabilities were reported in nginx. A remote user can consume excessive CPU resources on the target system. A remote user can consume excessive memory on the target system.

A remote user can issue a specially crafted HTTP/2 request to cause excessive memory consumption [CVE-2018-16843].

A remote user can issue a specially crafted HTTP/2 request to cause excessive CPU consumption [CVE-2018-16844].

Systems compiled with the ngx_http_v2_module (i.e., not the default) and with the "https" option of the "listen" directive are affected.

Gal Goldshtein from F5 Networks reported one of these vulnerabilities.

Impact:   A remote user can consume excessive CPU resources on the target system.

A remote user can consume excessive memory resources on the target system.

Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://usn.ubuntu.com/usn/usn-3812-1

Vendor URL:  usn.ubuntu.com/usn/usn-3812-1 (Links to External Site)
Cause:   Resource error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  14.04 LTS, 16.04 LTS, 18.04 LTS, 18.10

Message History:   This archive entry is a follow-up to the message listed below.
Nov 7 2018 nginx HTTP/2 Processing Bugs Lets Remote Users Deny Service



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