USN-3356-1: Expat vulnerability

USN-3356-1: Expat vulnerability

Ubuntu Security Notice USN-3356-1

19th July, 2017

expat vulnerability

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

• Ubuntu 17.04
• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Expat could be made to hang if it received specially crafted input.

Software description

• expat
  – XML parsing C library

Details

It was discovered that Expat incorrectly handled certain external entities.
A remote attacker could possibly use this issue to cause Expat to hang,
resulting in a denial of service.

Update instructions

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

Ubuntu 17.04:

libexpat1

2.2.0-2ubuntu0.1

lib64expat1

2.2.0-2ubuntu0.1

Ubuntu 16.10:

libexpat1

2.2.0-1ubuntu0.1

lib64expat1

2.2.0-1ubuntu0.1

Ubuntu 16.04 LTS:

libexpat1

2.1.0-7ubuntu0.16.04.3

lib64expat1

2.1.0-7ubuntu0.16.04.3

Ubuntu 14.04 LTS:

libexpat1

2.1.0-4ubuntu1.4

lib64expat1

2.1.0-4ubuntu1.4

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-2017-9233

Source: USN-3356-1: Expat vulnerability