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Mozilla Foundation Security Advisory 2006-74
Title: Mail header processing heap overflows
Announced: December 19, 2006
Reporter: Georgi Guninski, David Bienvenu
Products: Thunderbird, SeaMonkey
Fixed in: Thunderbird 220.127.116.11
Georgi Guninski reported that long Content-Type headers in external message bodies could cause a heap buffer overflow when processing mail headers. While working on that code David Bienvenu discovered a similar overflow could occur when processing long rfc2047-encoded headers.
Either overflow could be exploited to execute arbitrary code.
None, upgrade to a fixed version immediately.