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Bug #80203 imap_mime_header_decode() is not binary safe
Submitted: 2020-10-08 12:00 UTC Modified: 2020-10-19 15:52 UTC
Votes:1
Avg. Score:4.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: cmb@php.net Assigned:
Status: Open Package: IMAP related
PHP Version: 7.3Git-2020-10-08 (Git) OS: *
Private report: No CVE-ID: None
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 [2020-10-08 12:00 UTC] cmb@php.net
Description:
------------
If NUL bytes are encoded in the encoded-word, the decoded text
is truncated at that position.

Test script:
---------------
<?php
var_dump(bin2hex(imap_mime_header_decode("=?UTF-8?Q?foo=00bar?=")[0]->text));
var_dump(bin2hex(imap_mime_header_decode("=?UTF-8?B?Zm9vAGJhcg==?=")[0]->text));
?>


Expected result:
----------------
string(14) "666f6f00626172"
string(14) "666f6f00626172"


Actual result:
--------------
string(6) "666f6f"
string(6) "666f6f"


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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2020-10-08 12:00 UTC] cmb@php.net
-Assigned To: +Assigned To: cmb
 [2020-10-08 12:19 UTC] cmb@php.net
The following pull request has been associated:

Patch Name: Fix #80203: imap_mime_header_decode() is not binary safe
On GitHub:  https://github.com/php/php-src/pull/6301
Patch:      https://github.com/php/php-src/pull/6301.patch
 [2020-10-19 15:52 UTC] cmb@php.net
-Status: Assigned +Status: Open -Assigned To: cmb +Assigned To:
 [2020-10-19 15:52 UTC] cmb@php.net
It appears there are several more places where the IMAP extension
is not binary safe.  Fixing this piecemeal doesn't look right, but
I won't have time for a full review now.
 [2023-05-31 17:41 UTC] stevesmith22 at aol dot com
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