ALAS-2016-655


Amazon Linux AMI Security Advisory: ALAS-2016-655
Advisory Release Date: 2016-02-19 15:50 Pacific
Severity: Medium

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