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AUSCERT External Security Bulletin Redistribution
ESB-2017.3114
libxml2 vulnerability
6 December 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: libxml2
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-16932
Original Bulletin:
http://www.ubuntu.com/usn/usn-3504-1
http://www.ubuntu.com/usn/usn-3504-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
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Ubuntu Security Notice USN-3504-1
December 05, 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 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 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
In general, a standard system update will make all the necessary
changes.
References:
 https://www.ubuntu.com/usn/usn-3504-1
 CVE-2017-16932
Package Information:
 https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-4ubuntu1.1
 https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-2.2ubuntu0.2
 https://launchpad.net/ubuntu/+source/libxml2/2.9.3+dfsg1-1ubuntu0.4
 https://launchpad.net/ubuntu/+source/libxml2/2.9.1+dfsg1-3ubuntu4.11
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==========================================================================
Ubuntu Security Notice USN-3504-2
December 05, 2017
libxml2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 12.04 ESM
Summary:
curl could be made to crash if it received specially crafted
input.
Software Description:
- - libxml2: GNOME XML library
Details:
USN-3504-1 fixed a vulnerability in libxml2. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory 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 12.04 ESM:
 libxml2                         2.7.8.dfsg-5.1ubuntu4.19
 libxml2-utils                   2.7.8.dfsg-5.1ubuntu4.19
 python-libxml2                  2.7.8.dfsg-5.1ubuntu4.19
In general, a standard system update will make all the necessary
changes.
References:
 https://www.ubuntu.com/usn/usn-3504-2
 https://www.ubuntu.com/usn/usn-3504-1
 CVE-2017-16932
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