USN-3504-1: libxml2 vulnerability

Ubuntu Security Notice USN-3504-1

5th December, 2017

libxml2 vulnerability

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

Ubuntu 17.10
Ubuntu 17.04
Ubuntu 16.04 LTS
Ubuntu 14.04 LTS

Summary

libxml2 could be made to crash if it opened a specially crafted
file.

Software description

libxml2
– GNOME XML library

Details

Wei Lei discovered that libxml2 incorrecty handled certain parameter
entities. An attacker could use this issue with specially constructed XML
data to cause libxml2 to consume resources, leading to a denial of service.

Update instructions

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

Ubuntu 17.10:: libxml2

2.9.4+dfsg1-4ubuntu1.1; libxml2-utils

2.9.4+dfsg1-4ubuntu1.1; python-libxml2

2.9.4+dfsg1-4ubuntu1.1; python3-libxml2

2.9.4+dfsg1-4ubuntu1.1
Ubuntu 17.04:: libxml2

2.9.4+dfsg1-2.2ubuntu0.2; libxml2-utils

2.9.4+dfsg1-2.2ubuntu0.2; python-libxml2

2.9.4+dfsg1-2.2ubuntu0.2; python3-libxml2

2.9.4+dfsg1-2.2ubuntu0.2
Ubuntu 16.04 LTS:: libxml2

2.9.3+dfsg1-1ubuntu0.4; libxml2-utils

2.9.3+dfsg1-1ubuntu0.4; python-libxml2

2.9.3+dfsg1-1ubuntu0.4
Ubuntu 14.04 LTS:: libxml2

2.9.1+dfsg1-3ubuntu4.11; libxml2-utils

2.9.1+dfsg1-3ubuntu4.11; python-libxml2

2.9.1+dfsg1-3ubuntu4.11

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-2017-16932

Source: USN-3504-1: libxml2 vulnerability

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