USN-2892-1: nginx vulnerabilities

Ubuntu Security Notice USN-2892-1

9th February, 2016

nginx vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 15.10
Ubuntu 14.04 LTS

Summary

Several security issues were fixed in nginx.

Software description

nginx
– small, powerful, scalable web/proxy server

Details

It was discovered that nginx incorrectly handled certain DNS server
responses when the resolver is enabled. A remote attacker could possibly
use this issue to cause nginx to crash, resulting in a denial of service.
(CVE-2016-0742)

It was discovered that nginx incorrectly handled CNAME response processing
when the resolver is enabled. A remote attacker could use this issue to
cause nginx to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2016-0746)

It was discovered that nginx incorrectly handled CNAME resolution when
the resolver is enabled. A remote attacker could possibly use this issue to
cause nginx to consume resources, resulting in a denial of service.
(CVE-2016-0747)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 15.10:: nginx-extras

1.9.3-1ubuntu1.1; nginx-full

1.9.3-1ubuntu1.1; nginx-core

1.9.3-1ubuntu1.1; nginx-light

1.9.3-1ubuntu1.1
Ubuntu 14.04 LTS:: nginx-extras

1.4.6-1ubuntu3.4; nginx-full

1.4.6-1ubuntu3.4; nginx-core

1.4.6-1ubuntu3.4; nginx-light

1.4.6-1ubuntu3.4; nginx-naxsi

1.4.6-1ubuntu3.4

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2016-0742,

CVE-2016-0746,

CVE-2016-0747

Source: ubuntu-usn

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