UNKNOWNCVE-2019-11049

mail() may release string with refcount==1 twice

Platform

php

Component

php

Fixed in

7.4.1

In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.

How to fix

Actualice a PHP versión 7.3.13 o superior, o a la versión 7.4.1 o superior. Esto corrige la vulnerabilidad de doble liberación de memoria al usar la función mail() con encabezados personalizados en minúsculas en Windows.

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