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Ubuntu Security Notice USN-3356-1

Ubuntu Security Notice USN-3356-1
Posted Jul 19, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3356-1 - 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.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2017-9233
SHA-256 | 2bfed7f069c4187c12f4e904e868cfc4cb0052fe6d136336fe816266ea7e4044

Ubuntu Security Notice USN-3356-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3356-1
July 19, 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 versions:

Ubuntu 17.04:
lib64expat1 2.2.0-2ubuntu0.1
libexpat1 2.2.0-2ubuntu0.1

Ubuntu 16.10:
lib64expat1 2.2.0-1ubuntu0.1
libexpat1 2.2.0-1ubuntu0.1

Ubuntu 16.04 LTS:
lib64expat1 2.1.0-7ubuntu0.16.04.3
libexpat1 2.1.0-7ubuntu0.16.04.3

Ubuntu 14.04 LTS:
lib64expat1 2.1.0-4ubuntu1.4
libexpat1 2.1.0-4ubuntu1.4

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

References:
https://www.ubuntu.com/usn/usn-3356-1
CVE-2017-9233

Package Information:
https://launchpad.net/ubuntu/+source/expat/2.2.0-2ubuntu0.1
https://launchpad.net/ubuntu/+source/expat/2.2.0-1ubuntu0.1
https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.16.04.3
https://launchpad.net/ubuntu/+source/expat/2.1.0-4ubuntu1.4


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