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Mozilla Foundation Security Advisory 2009-33

Title: Crash viewing multipart/alternative message with text/enhanced part
Impact: High
Announced: June 22, 2009
Reporter: Bernd Jendrissek
Products: Thunderbird, SeaMonkey

Fixed in: Thunderbird
  SeaMonkey 1.1.17


Bernd Jendrissek reported a crash in Thunderbird when viewing a multipart/alternative mail message with a text/enhanced part. Internally this led to operations on an unexpected type of object resulting in a crash which may be exploitable.