- updated to 0.6.21
  * Fixed some buffer overflows in exif_entry_format_value()
    This fixes CVE-2012-2814.  Reported by Mateusz Jurczyk of
    Google Security Team
  * Fixed an off-by-one error in exif_convert_utf16_to_utf8()
    This can cause a one-byte NUL write past the end of the buffer.
    This fixes CVE-2012-2840
  * Don't read past the end of a tag when converting from UTF-16
    This fixes CVE-2012-2813. Reported by Mateusz Jurczyk of
    Google Security Team
  * Fixed an out of bounds read on corrupted input
    The EXIF_TAG_COPYRIGHT tag ought to be, but perhaps is not,
    NUL-terminated.
    This fixes CVE-2012-2812. Reported by Mateusz Jurczyk of
    Google Security Team
  * Fixed a buffer overflow problem in exif_entry_get_value
    If the application passed in a buffer length of 0, then it would
    be treated as the buffer had unlimited length.
    This fixes CVE-2012-2841
  * Fix a buffer overflow on corrupt EXIF data.
    This fixes bug #3434540 and fixes part of CVE-2012-2836
    Reported by Yunho Kim
  * Fix a buffer overflow on corrupted JPEG data
    An unsigned data length might wrap around when decremented
    below zero, bypassing sanity checks on length.
    This code path can probably only occur if exif_data_load_data()
    is called directly by the application on data that wasn't parsed
    by libexif itself.
    This solves the other part of CVE-2012-2836
  * Fixed some possible division-by-zeros in Olympus-style makernotes

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