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Ubuntu 15.10 & 14.04 LTS USN-2892-1 Moderate DoS in Nginx

ubuntu
Calendar Grey February 9, 2016
Scroller Ubuntu
A series of vulnerabilities in nginx impacting Ubuntu distributions necessitate urgent patches to maintain system security.
Several security issues were fixed in nginx.

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)

Topics%20covered

Topics Covered

security advisory moderate DoS Ubuntu DNS issue nginx

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 LTS:
  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

Severity
important
Lowest
Low
Medium
High
Critical

February 09, 2016

Topics%20covered

Topics Covered

security advisory moderate DoS Ubuntu DNS issue nginx

Package Information

https://launchpad.net/ubuntu/+source/nginx/1.9.3-1ubuntu1.1
https://launchpad.net/ubuntu/+source/nginx/1.4.6-1ubuntu3.4

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