Red Hat Bugzilla – Bug 249473
File magic file wrongly identifies text file as MPEG-4 LO-EP audio stream
Last modified: 2009-01-20 17:02:51 EST
Description of problem:
File will identify any text file starting with "Má" (iso-8859-1) as a MPEG-4
LO-EP audio stream. Since that character combination is fairly common on several
languages, this can cause serious problems.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. $ file magic-bug-sample.txt
magic-bug-sample.txt: MPEG-4 LO-EP audio stream
magic-bug-sample.txt: ISO-8859 text
Created attachment 159888 [details]
Sample file to reproduce the bug
You're right. I think we should rather remove support for the MPEG LO-EP format
-- it's very rare and if it really can be determined by the first two bytes
only, it makes more sense to report the text files correctly.
That is pretty much what I have been doing on my server. Removing the support
for that format and recompiling the mgc file.
Interesting too is the fact this only happens with the regular (non-mime) file
detection. The mime-type detection shows the file correctly, which points to
further problems, since there is a discrepancy between the regular and the
mime-type magic files.
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
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if the solution does not work for you.