Bug #9100

Error with nested boundaries where inner boundary is a subset of the outer

Details

Submitted	2006-10-20 04:31 UTC
From	rocca at start dot ca
Assigned	alan_k
Status	Closed
Package	Mail_mimeDecode
PHP Version	Irrelevant
OS	All
Roadmaps	1.6.0

Comments

[2006-10-20 04:31 UTC] rocca at start dot ca

Description:
------------
If the input data has an inner boundary that contains a subset of the outer boundary the _boundarySplit function will incorrectly parse the data.

For example:

Content-Type: multipart/mixed; boundary="abc"

--abc
Content-Type: multipart/mixed; boundary="abc_a"

--abc_a
inner

--abc_a--
outer

--abc--

...will return 'abc_a' as being at the same level as 'abc' and additionally create some garbage nodes.

Test script:
---------------
function _boundarySplit($input, $boundary) {

- $tmp = explode('--' . $boundary, $input);
+ $tmp = preg_split("/--$boundary(\b|--)/", $input);

[2006-11-07 14:50 UTC] rocca at start dot ca

Changing PHP/OS version to Irrelevant. Also the 'test script' is actually the diff required to fix the problem. Ie, using preg_split instead of explode.