There are a number of use-after-free vulnerabilities in MovieClip.beginGradientFill. If the spreadMethod or any other string parameter is an object with toString defined, this method can free the MovieClip, which is then used. Note that many parameters to this function can be used to execute script and free the MovieClip during execution, it is recommended that this issues be fixed with a stale pointer check.
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Red Hat Security Advisory 2015-2023-01 - The flash-plugin package contains a Mozilla Firefox compatible Adobe Flash Player web browser plug-in. This update fixes multiple vulnerabilities in Adobe Flash Player. These vulnerabilities, detailed in the Adobe Security Bulletin APSB15-28 listed in the References section, could allow an attacker to create a specially crafted SWF file that would cause flash-plugin to crash, execute arbitrary code, or disclose sensitive information when the victim loaded a page containing the malicious SWF content.
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