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Bug #31479 chunk_split() segfaults with too high chunklen
Submitted: 2005-01-10 22:57 UTC Modified: 2005-01-18 16:49 UTC
Votes:5
Avg. Score:3.8 ± 1.6
Reproduced:4 of 5 (80.0%)
Same Version:3 (75.0%)
Same OS:4 (100.0%)
From: gz at moonky dot de Assigned:
Status: Closed Package: Reproducible crash
PHP Version: 4CVS, 5CVS (2005-01-11) OS: *
Private report: No CVE-ID: None
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From: gz at moonky dot de
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 [2005-01-10 22:57 UTC] gz at moonky dot de 
Description:
------------
chunk_split() segfaults when chunklen is too big (possible dos?)

Reproduce code:
---------------
<?php
chunk_split(".", 1000000000);
?>

Expected result:
----------------
ehrrm... ;-)

Actual result:
--------------
(gdb) bt
#0  0xb7d79cef in memcpy () from /lib/tls/libc.so.6
#1  0x080e6c21 in php_chunk_split (src=0x81f4afc "", srclen=1, end=0x8180d20 "\r\n", endlen=2, chunklen=1000000000, 
    destlen=0xbfffd544) at /home/moonky/src/php-4.3.9/ext/standard/string.c:1521
#2  0x080e6f98 in zif_chunk_split (ht=2, return_value=0x81ef874, this_ptr=0x0, return_value_used=0)
    at /home/moonky/src/php-4.3.9/ext/standard/string.c:1582
[...]

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 [2005-01-18 16:49 UTC] iliaa@php.net 
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/.
 
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