USN-2892-1: nginx vulnerabilities

Releases

• Ubuntu 15.10
• Ubuntu 14.04 ESM

Packages

• 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 versions:

Ubuntu 15.10

• nginx-core - 1.9.3-1ubuntu1.1
• nginx-extras - 1.9.3-1ubuntu1.1
• nginx-full - 1.9.3-1ubuntu1.1
• nginx-light - 1.9.3-1ubuntu1.1

Ubuntu 14.04

• nginx-core - 1.4.6-1ubuntu3.4
• nginx-extras - 1.4.6-1ubuntu3.4
• nginx-full - 1.4.6-1ubuntu3.4
• nginx-light - 1.4.6-1ubuntu3.4
• nginx-naxsi - 1.4.6-1ubuntu3.4

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

References

• CVE-2016-0742
• CVE-2016-0746
• CVE-2016-0747