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Ubuntu Security Notice USN-4040-1

Ubuntu Security Notice USN-4040-1
Posted Jun 26, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4040-1 - It was discovered that Expat incorrectly handled certain XML files. An attacker could possibly use this issue to cause a denial of service.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2018-20843
MD5 | 8a2268f01692d4bc3975a03c81246d17

Ubuntu Security Notice USN-4040-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-4040-1
June 26, 2019

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

- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Expat could be made to consume a high amount of RAM and CPU resources
if it received a specially crafted XML file.

Software Description:
- expat: XML parsing C library

Details:

It was discovered that Expat incorrectly handled certain XML files.
An attacker could possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 19.04:
libexpat1 2.2.6-1ubuntu0.19.04

Ubuntu 18.10:
libexpat1 2.2.6-1ubuntu0.18.10

Ubuntu 18.04 LTS:
libexpat1 2.2.5-3ubuntu0.1

Ubuntu 16.04 LTS:
lib64expat1 2.1.0-7ubuntu0.16.04.4
libexpat1 2.1.0-7ubuntu0.16.04.4

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

References:
https://usn.ubuntu.com/4040-1
CVE-2018-20843

Package Information:
https://launchpad.net/ubuntu/+source/expat/2.2.6-1ubuntu0.19.04
https://launchpad.net/ubuntu/+source/expat/2.2.6-1ubuntu0.18.10
https://launchpad.net/ubuntu/+source/expat/2.2.5-3ubuntu0.1
https://launchpad.net/ubuntu/+source/expat/2.1.0-7ubuntu0.16.04.4
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