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    Ubuntu 4541-1: Gnuplot vulnerabilities

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    Several security issues were fixed in Gnuplot.
    ==========================================================================
    Ubuntu Security Notice USN-4541-1
    September 25, 2020
    
    gnuplot vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in Gnuplot.
    
    Software Description:
    - gnuplot: Command-line driven interactive plotting program
    
    Details:
    
    Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars
    discovered that Gnuplot did not properly validate string sizes in the
    df_generate_ascii_array_entry function. An attacker could possibly use
    this issue to cause a heap buffer overflow, resulting in a denial of
    service attack or arbitrary code execution. (CVE-2018-19490)
    
    Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars
    discovered that Gnuplot did not properly validate string sizes in the
    PS_options function when the Gnuplot postscript terminal is used as a
    backend. An attacker could possibly use this issue to cause a buffer
    overflow, resulting in a denial of service attack or arbitrary code
    execution. (CVE-2018-19491)
    
    Tim Blazytko, Cornelius Aschermann, Sergej Schumilo and Nils Bars
    discovered that Gnuplot did not properly validate string sizes in the
    cairotrm_options function when the Gnuplot postscript terminal is used
    as a backend. An attacker could possibly use this issue to cause a
    buffer overflow, resulting in a denial of service attack or arbitrary
    code execution. (CVE-2018-19492)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      gnuplot                         4.6.6-3ubuntu0.1
      gnuplot-data                    4.6.6-3ubuntu0.1
      gnuplot-nox                     4.6.6-3ubuntu0.1
      gnuplot-qt                      4.6.6-3ubuntu0.1
      gnuplot-tex                     4.6.6-3ubuntu0.1
      gnuplot-x11                     4.6.6-3ubuntu0.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4541-1
      CVE-2018-19490, CVE-2018-19491, CVE-2018-19492
    
    Package Information:
      https://launchpad.net/ubuntu/+source/gnuplot/4.6.6-3ubuntu0.1
    
    

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