USN-3504-1: libxml2 vulnerability

Releases

• Ubuntu 17.10
• Ubuntu 17.04
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• 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 versions:

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

• 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

• libxml2 - 2.9.1+dfsg1-3ubuntu4.11
• libxml2-utils - 2.9.1+dfsg1-3ubuntu4.11
• python-libxml2 - 2.9.1+dfsg1-3ubuntu4.11

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

References

• CVE-2017-16932

Related notices

• USN-3504-2: libxml2-utils, libxml2, python-libxml2
• USN-3739-1: libxml2-dev, libxml2-doc, libxml2, libxml2-udeb, libxml2-utils, python-libxml2, python3-libxml2