Medium: nginx

Issue Overview:

It was discovered that nginx could perform an out of bound read and dereference an invalid pointer when resolving CNAME DNS records. An attacker able to manipulate DNS responses received by nginx could use this flaw to cause a worker process to crash if nginx enabled the resolver in its configuration. (CVE-2016-0742)

A use-after-free flaw was found in the way nginx resolved certain CNAME DNS records. An attacker able to manipulate DNS responses received by nginx could use this flaw to cause a worker process to crash or, possibly, execute arbitrary code if nginx enabled the resolver in its configuration. (CVE-2016-0746)

It was discovered that nginx did not limit recursion when resolving CNAME DNS records. An attacker able to manipulate DNS responses received by nginx could use this flaw to cause a worker process to use an excessive amount of resources if nginx enabled the resolver in its configuration. (CVE-2016-0747)

Affected Packages:

nginx

Issue Correction:
Run yum update nginx to update your system.

New Packages:

i686:  
    nginx-1.8.1-1.26.amzn1.i686  
    nginx-debuginfo-1.8.1-1.26.amzn1.i686  
  
src:  
    nginx-1.8.1-1.26.amzn1.src  
  
x86_64:  
    nginx-debuginfo-1.8.1-1.26.amzn1.x86_64  
    nginx-1.8.1-1.26.amzn1.x86_64  

Additional References

Red Hat: CVE-2016-0742, CVE-2016-0746, CVE-2016-0747

Mitre: CVE-2016-0742, CVE-2016-0746, CVE-2016-0747