CVE-2018-19492

Se ha descubierto un problema en cairo.trm en Gnuplot 5.2.5. Este problema permite a un atacante realizar un desbordamiento de búfer con una cantidad arbitraria de datos en la función ccairotrm_options. Este fallo se debe a la falta de una comprobación de tamaño de un argumento pasado a la función "set font". Esto ocurre cuando el terminal pngcairo de Gnuplot se utiliza como un backend.

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. 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. Various other issues were also addressed.