https://bugzilla.wikimedia.org/show_bug.cgi?id=31740
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Bug #: 31740
Summary: JpegMetadataExtractor lacks bounds checking, spams
error logs with E_WARNING
Product: MediaWiki
Version: 1.18
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Images and files
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
When running refreshImageMetadata.php on angwiki, I got:
Warning: unpack(): Type N: not enough input, need 4, have 0 in
/usr/local/apache/common-local/php-1.18/includes/media/JpegMetadataExtractor.php
on line 205
298290 times, and then I hit ctrl-C. JpegMetadataExtractor should use a wrapper
around unpack that guards against reading beyond the end of the string. I made
one for ZipDirectoryReader, maybe we should factor that out for the benefit of
other binary format parsers.
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