From:
Operating system: Linux / Windows
PHP version: 5.2.13
Package: ICONV related
Bug Type: Bug
Bug description:iconv_mime_decode() does not ignore malformed Q-encoded words
Description:
------------
When calling iconv_mime_decode() with $mode =
ICONV_MIME_DECODE_CONTINUE_ON_ERROR,
the manual states that "iconv_mime_decode_headers() attempts to ignore any
grammatical errors and continue to process a given header."
Accordingly, B-encoded encoded-words (as per RFC 2047) are silently
ignored.
But when using Q (quoted-printable) encoding, encoded-words with illegal
characters (> 127) cause iconv_mime_decode() to return false as if
ICONV_MIME_DECODE_CONTINUE_ON_ERROR was not specified.
As such it is not resilient towards malformed headers.
Test script:
---------------
$m = ICONV_MIME_DECODE_CONTINUE_ON_ERROR;
var_dump(iconv_mime_decode("Legal encoded-word: =?utf-8?B?Kg==?= .", $m));
var_dump(iconv_mime_decode("Legal encoded-word: =?utf-8?Q?*?= .", $m));
var_dump(iconv_mime_decode("Illegal encoded-word: =?utf-8?B?".chr(0xA1)."?=
.", $m));
var_dump(iconv_mime_decode("Illegal encoded-word: =?utf-8?Q?".chr(0xA1)."?=
.", $m));
Expected result:
----------------
string(23) "Legal encoded-word: * ."
string(23) "Legal encoded-word: * ."
string(24) "Illegal encoded-word: ."
string(24) "Illegal encoded-word: ."
Actual result:
--------------
string(23) "Legal encoded-word: * ."
string(23) "Legal encoded-word: * ."
string(24) "Illegal encoded-word: ."
bool(false)
--
Edit bug report at http://bugs.php.net/bug.php?id=51250&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=51250&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=51250&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=51250&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=51250&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=51250&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=51250&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=51250&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=51250&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=51250&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=51250&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=51250&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=51250&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=51250&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=51250&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51250&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=51250&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=51250&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=51250&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=51250&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=51250&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=51250&r=mysqlcfg
