Operating System:

[Ubuntu]

Published:

11 February 2020

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.0471
                    USN-4274-1: libxml2 vulnerabilities
                             11 February 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           libxml2
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-7595 CVE-2019-19956 

Reference:         ESB-2020.0025

Original Bulletin: 
   https://usn.ubuntu.com/4274-1/

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USN-4274-1: libxml2 vulnerabilities
10 February 2020

libxml2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 ESM
  o Ubuntu 12.04 ESM

Summary

Several security issues were fixed in libxml2.

Software Description

  o libxml2 - GNOME XML library

Details

It was discovered that libxml2 incorrectly handled certain XML files. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2019-19956, CVE-2020-7595)

Update instructions

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

Ubuntu 19.10
    libxml2 - 2.9.4+dfsg1-7ubuntu3.1
    libxml2-utils - 2.9.4+dfsg1-7ubuntu3.1
Ubuntu 18.04 LTS
    libxml2 - 2.9.4+dfsg1-6.1ubuntu1.3
    libxml2-utils - 2.9.4+dfsg1-6.1ubuntu1.3
Ubuntu 16.04 LTS
    libxml2 - 2.9.3+dfsg1-1ubuntu0.7
    libxml2-utils - 2.9.3+dfsg1-1ubuntu0.7
Ubuntu 14.04 ESM
    libxml2 - 2.9.1+dfsg1-3ubuntu4.13+esm1
    libxml2-utils - 2.9.1+dfsg1-3ubuntu4.13+esm1
Ubuntu 12.04 ESM
    libxml2 - 2.7.8.dfsg-5.1ubuntu4.22
    libxml2-utils - 2.7.8.dfsg-5.1ubuntu4.22

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

  o CVE-2019-19956
  o CVE-2020-7595

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