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Bug #40109 iptcembed fails on non-jfif jpegs
Submitted: 2007-01-12 06:44 UTC Modified: 2007-02-12 20:40 UTC
From: kb0 dot org at gmail dot com Assigned:
Status: Closed Package: *Graphics related
PHP Version: All OS: all
Private report: No CVE-ID: None
View Developer Edit
 [2007-01-12 06:44 UTC] kb0 dot org at gmail dot com 
Description:
------------
The poorly documented iptcembed function fails to insert a header (and throws no errors) when a jpeg lacks the APP0 marker.  The code in iptc.c is currently written to insert the new APP13 section immediately after the APP0 section.  When this is missing, the function falls straight through.

Reproduce code:
---------------
http://www.php.net/manual/en/function.iptcembed.php#18549

Expected result:
----------------
Image with new iptc data inserted at APP13 marker

Actual result:
--------------
Image copied, yet stripped of old iptc data

Patches

Pull Requests

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 [2007-01-12 07:33 UTC] kevin dot burek at gmail dot com 
Tested in newest build and problem persists.
 [2007-01-12 07:37 UTC] kevin dot burek at gmail dot com 
here's a diff for 5.2.0 that should patch many of the cases that this bug manifests:

183c183
< 	unsigned int spool = 0, done = 0, inx, len;	
---
> 	unsigned int spool = 0, done = 0, written=0, inx, len;	
266a267,268
> 			case M_APP1:
> 				/* APP1 (EXIF) usually appears in lieu of a missing APP0 (JFIF) */ 
268a271
> 				if (written) break; /* it seems we've already written our header */
281a285
> 				written = 1;
 [2007-01-12 09:19 UTC] [email protected] 
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.
 [2007-01-12 21:58 UTC] kb0 dot org at gmail dot com 
Reproduction code:
http://photos.kb0.org/php/bug40109.php
http://photos.kb0.org/php/bug40109.phps
 [2007-02-12 20:40 UTC] [email protected] 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
Thank you for the report, and for helping us make PHP better.
 
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