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Mozilla SeaMonkey 2.16.x < 2.16.1 nsHTMLEditor User-After-Free

High

Synopsis

The remote host has a web browser installed that is vulnerable by a user-after-free vulnerability

Description

Versions of SeaMonkey 2.16.x earlier than 2.16.1 are potentially affected.

An error exists in the HTML editor (nsHTMLEditor) related to content script and the calling of the function 'document.execCommand' while internal editor operations are running. The previously freed memory can be dereferenced and could lead to arbitrary code execution

Solution

Upgrade to SeaMonkey 2.16.1 or later.