ESB-2017.3114 - [Ubuntu] libxml2: Denial of service - Remote/unauthenticated 2017-12-06

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             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.

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
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
- -------------------------------------------------------------------------

==========================================================================
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

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=M3dk
-----END PGP SIGNATURE-----

« Back to bulletins