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             AUSCERT External Security Bulletin Redistribution

                    USN-4107-1: GIFLIB vulnerabilities
                              21 August 2019


        AusCERT Security Bulletin Summary

Product:           GIFLIB
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-15133 CVE-2018-11490 CVE-2016-3977

Original Bulletin: 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running GIFLIB check for an updated version of the software for 
         their operating system.

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USN-4107-1: GIFLIB vulnerabilities
20 August 2019

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

  o Ubuntu 19.04
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS


Several security issues were fixed in GIFLIB.

Software Description

  o giflib - library for GIF images (utilities)


It was discovered that GIFLIB incorrectly handled certain GIF files. An
attacker could possibly use this issue to cause a denial of service. This issue
only affected Ubuntu 18.04 LTS. (CVE-2016-3977)

It was discovered that GIFLIB incorrectly handled certain GIF files. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2018-11490, CVE-2019-15133)

Update instructions

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

Ubuntu 19.04
    giflib-tools - 5.1.4-3ubuntu0.1
    libgif7 - 5.1.4-3ubuntu0.1
Ubuntu 18.04 LTS
    giflib-tools - 5.1.4-2ubuntu0.1
    libgif7 - 5.1.4-2ubuntu0.1
Ubuntu 16.04 LTS
    giflib-tools - 5.1.4-0.3~16.04.1
    libgif7 - 5.1.4-0.3~16.04.1

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.


  o CVE-2016-3977
  o CVE-2018-11490
  o CVE-2019-15133

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