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Category:   Application (Web Server/CGI)  >   nginx Vendors:   nginx.org
(Ubuntu Issues Fix) nginx DNS Processing Flaws Let Remote Users Deny Service
SecurityTracker Alert ID:  1034991
SecurityTracker URL:  http://securitytracker.com/id/1034991
CVE Reference:   CVE-2016-0742, CVE-2016-0746, CVE-2016-0747   (Links to External Site)
Date:  Feb 10 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.6.18 - 1.9.9
Description:   Several vulnerabilities were reported in nginx. A remote user can consume excessive resources on the target system. A remote user can cause the target service to crash.

A remote user can forge and send specially crafted UDP packets to trigger an invalid pointer dereference and cause the target worker process to crash [CVE-2016-0742].

A remote user can cause the target system to perform CNAME name resolution to trigger a use-after-free memory error and cause the target worker process to crash [CVE-2016-0746]. Other unspecified impacts may occur.

A remote user can cause the target system to perform arbitrary CNAME name resolution to consume excessive resources on the target system [CVE-2016-0747].

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

A remote user can cause the target worker process to crash.

Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-2892-1

Vendor URL:  www.ubuntu.com/usn/usn-2892-1 (Links to External Site)
Cause:   Access control error, Resource error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  14.04 LTS, 15.10

Message History:   This archive entry is a follow-up to the message listed below.
Jan 29 2016 nginx DNS Processing Flaws Let Remote Users Deny Service



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